What seije wrote -- that you want to bet/raise bigger to build a bigger pot, in case he has a hand like he had -- is a key point imo, since a lot of beginners are too concerned with making ppl fold when you get a big hand.

Remember you're playing his cards too, and if he folds pre flop, don't worry -- he probably had junk anyways and was only going to give you action post flop if he could beat one pair. But if he has AK or TT+, you'll get his stack easier post flop by making the pot start off big.