Google

I've already posted about shortcuts in browsers. They are links who are associated with keywords or keymarks (in Opera, but they're also available on firefox. Don't know about the other browsers cuz I don't use them so much).

This one's an egg! It's the "Feeling Lucky" google search engine shortcut. The quickest way to go anywhere you want in the web! Feel free to try it!

In Firefox, add the link above in your bookmarks, then edit it's properties and fill the keyword field with "goto" or "gogo" or "f", or whatever you like; then save.

In Opera, copy the link above paste it in your preferences-->search-->add, then in the shortcut field type in "goto", "gogo", or simply "f", ad lib. Then save.

Then, from the address bar, type "goto calendar" or "goto maps", "goto blogger home", "goto sl" ... and you'll be directly ported to your google calendar, google maps, blogger homepage or Second Life homepage. It's pretty powerful for me, maybe it's too for you.