Get rid of the aero desktop at least, customize the effects how you want. It can still look nice even without the full aero transparent effect. Or go all the way performance to looking like Win98. Frees up a decent amount of memory dropping aero, but Win7 doesn't benefit quite as much as Vista did since it's already more efficient. Otherwise, processing priority goes to the app you're working with at the forefront, so you shouldn't have to manually assign cpu priority.
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