Support help! phone got real slow

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http://androidforums.com – Phone is freezing up. Don't know why. Help please. Can hardly even make this post. Keep getting apps not responding messages. Download speeds are ranging from 8kbps 2 40kbps. Tried deleting throttle files (data/system/throttle) helped a little. Carrier says everything OK on their end. Signal strength poor here but last week was seeing 350+kbps same area and w/one bar. Main problem right now is phone itself Is slow even offline. Also, is there way 2 manually stop apps from starting on boot like on pc? Im rooted and would like to edit file myself. I've tried different apps but don't know if the (General)