Fix Your Facebook
Hide application notices: Are you sick of Farmville, Mafia Wars, and other Facebook apps cluttering your feed? Mouse over the entry, and click Hide. You'll block those alerts from your wall.
Invite a list of friends to an event: You don't have to manually click a bunch of friends to send event invitations. Instead, create a list first. Click Friends in the left column, and use Create a List on top to pick certain friends. When making an event invitation, click the Filter Friends tab to show only the list. Click Select All.
Hide content from certain contacts: Keep your mom and work acquaintances from seeing messages intended for your inner circle. Click the lock privacy icon, and choose Customize.
From there, you can hide the post from specific people, or show it only to your entourage. For more on Facebook's privacy settings, read "Protect Your Privacy With the New Facebook Settings."
Cut to the core: The Lite version of Facebook strips away most of the clutter in the main design. It's great if you're on a slow Internet connection, browsing on a netbook, or just want to avoid the usual mess.
Browse to lite.facebook.com to give it a try, and click the link at the top of the page to toggle back to the full site.
Schedule tweets: You can set up a schedule for your Twitter account, so posts can go up while you are asleep, or--heaven forbid--are away from your gadgets.
This way, you'll be able to tweet across time zones (so your international followers won't have to scroll all the way down to hear from you, perhaps), and keep your Twitter account active when you need to focus on a project.
Get deals by following companies: Some of your favorite companies might post deals to Twitter. You'll have to sort away businesses that spam followers too often, but I like following @amazonmp3, @amazongames, and @woot.
If you really want to step up your hustle, make a new Twitter account specifically for landing freebies so the spam won't get to your real one. Keep it all straight with a twitter client that manages multiple accounts, such as Tweetdeck. Also, check out "How to Win Prizes on Twitter" for more tips.
Learn about current events: Look for your local Happen.in feed, which charts Twitter chatter based on your location.
If a bunch of people in the same area post "bridge out," Happen.in will repost the details so that you keep on track of regional events and trends. The Twitter Website includes similar functionality in the right-hand column. Adjust those Trending settings to set it for your area.
Expand URLs: Shortened links could send you to a funny YouTube clip, a popular article in the New York Times, or a site designed to riddle your PC with malware. Use a Greasemonkey script (a Firefox add-on) and just hover your mouse over the cryptic URL to see the full version at the bottom of the window.
If you're in a different browser, try pbtweet or read How to Use Greasemonkey Scripts in IE, Chrome, and Safari for more details.