I've honestly never been able to decide whether this is just my imagination or really happening.
The best one though is the shortening of the logfile to 1 day. This DOES work, and the reason is that your phone doesn't have to have so much data cached when running around the OS.
Man, I forgot about the *#7780# type of reset... SO nice, did that ane everything is so much smoother on my phone now, but didn't have to reinstall everything.
-olly