no matter what everyone says. Task managers are very helpful.
I recommend
Advanced Task Killer Android App Review by AndroidTapp.com | Android Tapp. Android App Reviews
Advanced Task Killer, one touch kill all, and it will remember what not to kill.
Also if you "lock/unlock" the phone tasks that may look like they are frozen will star working again.
Some tiny bugs that hopefully will be fixed on December 10th/11th with the proposed Over The Air update
and maybe Android 2.1