#1. Finder of Lost Links – Although the internet has a wealth of information, too much of it is locked behind the dreaded 404 Page Not Found. Permalinks only remain permanent as long as the hosting service gets paid; when a website shuts down the information usually goes with it.

But the Internet Archive Wayback Machine provides a way to resurrect lost links. Just cut and paste the broken link into the search box and if the site was archived the Wayback Machine will find it. Will Benton adds a helpful technique, "You can also drag the following link (ia) to your bookmarks bar and then press it when you've tried to visit a broken page. It will ask the Internet Archive to show you all of the versions it has of the site named in the location bar -- no copy and paste necessary."

#11 Amazon Link Hack – When linking to a book I often use Amazon as the reference link. Unfortunately, that often means having to use a 114 character monstrosity like this:

http://www.amazon.com/exec/obidos/ASIN/0596004478/qid%3D1049157816/sr%3D11-1/ref%3Dsr%5F11%5F1/104-2773718-4336742

Fortunately, such a link can be simplified. Begin by cutting all but the first string of numbers after the “ASIN”:

http://www.amazon.com/exec/obidos/ASIN/0596004478/

You can also cut it further by replacing “exec/obidos” with “o”, as in:

http://amazon.com/o/ASIN/0596004478

That brings it down from 114 characters to a more manageble 35.

#45 Homepage Hack -- If you’re like me you probably open several websites at a time (i.e., Gmail, Sitemeter, your blog). Using Firefox you can set your homepage to open several tabs open them all at one time. From Firefox’s Tools menu click Options, General, and then enter the addresses of sites separated by a pipe symbol ( | ). If that's too complicated, simply open up all the sites in tabs and hit the “Use Current Pages” button.

#68 The De Finetti Game -- The De Finetti Game is a method to gauge someone’s confidence in the chances of a given event occurring by measuring it against a lottery with a known probability. Say for example a friend claims he is 95% sure he aced a test. Is he really that confident? Offer him a hypothetical choice. He can either get the result of the test, and if he aced it, he wins one million dollars, or he can pick a ball out of bag. There are 90 red balls and 10 blue in the bag, and if he picks a red ball then he wins the million. Now if he doesn’t choose his test score then he is at most 90% confident.

Now tell him that there are now 70 red balls in the bag and 30 black ones. If he answers that he would rather wait on the results of the test rather than draw, then he is between 70-90% sure of the outcome. You can keep adjusting the ratio of red to blue balls until he chooses the test score to find out how confident he really is. (Source: Amir D. Aczel’s Chance)

#80 Snail Mail Spam Stopper -- If you’re cursed with a good credit rating then you probably receive a torrent of pre-approval notices from credit card companies. You can exclude your name from such lists by simply filling out the form at OPTOUTPRESCREEN.COM.

#94 Front Page -- Sure you can read most newspapers online. But what if you want to know what’s actually on the front page? Newseum has a world map (made in Macromedia Flash) which you can scroll through different areas around the world to get front pages in 44 countries. Currently there are over 400 front pages you can read everyday. So whether you’re in Istanbul and want to see what’s on the Dallas Morning News or in Boise and want Jamaica’s The Gleaner you’ll be able to download a PDF of the latest front page.

#101 Gmap Pedometer -- So your ready to train for the upcoming marathon but aren't sure how far around your neighborhood you need to run to cover 26 miles. Thanks to Gmap pedometer you can use Google's mapping application to help record distances traveled during a running or walking workout.

#108 Math Hack -- "Measuring probabilities," says Amir Aczel, "is a simple as counting." Simply count the possibilities of an event and divide this number by the total number of possibilities (assuming the possibilities are equally likely). For example, what is the probability of rolling an even number on a six-sided die? Since there are three even numbers (two, four, six) out of six equally likely numbers, the answer is 3/6 = 1/2, or fifty percent. What if you have a deck of fifty-two playing cards, what is the probability of drawing an ace? Since there are four aces out of fifty-two cards equally likely to be chosen, the probability of an ace is 4/52 = 1/13 = 0.0769, or about eight percent.

#116 PDF Hack -- Need to convert a file (i.e., HTML, DOC, PPT) or picture (i.e., JPG, BMP, PNG) into a PDF? A free web-based service at PDF Online not only allows you to convert various file types into PDF but offers a way to convert PDF files to HTML.

#180 Paper PDA -- If you find the Hipster PDA (#3) to be too high tech, you might find the PocketMod more to your liking. The PocketMod is a small book with guides on each page. These guides or templates, combined with a unique folding style, enable you to transform a single sheet of paper into the ultimate note card. This free, disposable PDA will make you forget you ever needed a Palm Pilot.

#201 Library Hack -- For years I've wanted to catalog all the books in my personal library (over 1000 volumes) but was too lazy to make the effort. Fortunately, my procrastination has paid off. LibraryThing is a web application that lets you add book titles by entering a title and viewing search results from the Library of Congress or Amazon. The program then adds the book’s card to your catalog with ISBN, publisher, year and an image of the book cover. You have space to add a book summary, tags, comments, and a review -- and can even see what other users also have each book in their library. You can enter 200 books for free or buy a lifetime membership for $10 (beta special).

#210 Copy and Paste Hack -- The "copy and paste" function is undoubtably one of the greatest innovations in the modern age. But few things are more frustrating than have having to go through the four click routine of “Edit” --> “Paste Special” --> “Unformatted Text” --> “OK” needed to past unformatted text. Fortunately, using PureText, a Windows utility that lets you paste unformatted text into any open window in any program, I can perform the same function using Windows+V. PureText is one of the simplest and yet most satisfying programs to come along in ages.

#220 Gmail Hack -- GmailThis! is an easy way to make a Gmail email without visiting mail.google.com. Once you add the GmailThis! link to your browser's toolbar, clicking GmailThis! creates a mini-interface to Gmail prepopulated with a link to the web page you are visiting, as well as any text you have highlighted on that page. Add additional text if you wish and then email or save as draft from within GmailThis! An indispensible tool.