cut down your range massively. get software like table ninja/table optimizer.
its a bit harder also at the lower levels, cos youre playing lots of one tabling fish who act instantly. at the higher levels (100nl+) most players are multitabling, which results in more time for you to act, since opponents arent acting instantly themselves.
at the end of the day though, you just need to be playing solidly preflop. 99% of preflop decisions are pretty automatic and clear cut, which makes playing well postflop a ton easier too, and yeah allows for mass multitabling