With remote login, you don't need to be anywhere near your computer to use it. Remote login services allow you access to your home computer—including all your personal applications, documents, settings and even that desktop wallpaper of your cute puppy—from any web-connected computer in the world.
While you've probably seen remote logins at a professional level (it's the same type of program the IT folks at the office use to control your machine from theirs), there are services out there that cater to consumers like you who just want to be able to log in from anywhere.
One of the most popular is LogMeIn. LogMeIn Free is true to its name and absolutely free. It'll get you remote access to your home computer to browse your personal bookmarks or play your favorite iTunes playlist.
For a little more cash, you can get a few more features, like the ability to transfer files or print your remote files to a local printer. LogMeIn Pro costs $69.95 for the year for access to one computer, or you can subscribe monthly for just $12.20 per month.