One thing missing from the Galaxy S class of phones -- and this will hurt some of your more than others -- is proper LED notification. Sorry, it's just not there. If you miss a call, or get an e-mail or text message, you're on your own to wake the phone to check.
Unless ... You install a simple little app from madmack at XDA Developers. It pops a small red square onto your otherwise blank screen, alerting you if you've missed something. And before you can even think the words "pixel burnout," note that the square doesn't sit in one place, so that's a non-issue. Hit up the source link for the instructions, and tell 'em we sentcha. [XDA Developers via Android Spin]