I would suggest looking into QuickMenu,
http://www.freewarepocketpc.net/ppc-...menu-v2-7.html it is a free and POWERFUL tool that will keep programs in check and not stealing all the memory
another very useful tool is Oxios Memory,
http://www.oxios.com/memory/ another free program that makes sure when you close a program/app you get ALL the memory back
I normally average around 18+ on memory