Microsoft has released Skype 6.15, which fixes two instances of crashes (one at launch and one when quitting) that were identified thanks to users in Skype’s Community Forums. The update also fixes a bug that prevented per-conversation notification settings from sticking and an issue with animated emoticons using too many CPU cycles. Finally, the release also eliminates crashes when screen sharing on a MacBook Pro (with the associated recommendation that MacBook Pro users also update to OS X 10.9.2 Mavericks). (Free, 41.5 MB, release notes)
Avoid Simple Typos
If, like me, you find yourself typing 2911 in place of 2011 entirely too often, you can have Mac OS X (either Lion or Snow Leopard) fix such typos for you automatically. Just open the Language & Text pane of System Preferences, click the Text button at the top, and then add a text substitution by clicking the + button underneath the list. It won't work everywhere (for that you'll want a utility like Smile's TextExpander), but it should work in applications like Pages and TextEdit, and in Save dialog boxes.