I always - when buying pre-made pizza's - (although I know your asking about making one from scratch) take all the ingrediants off and re-put on (so no 'packing/squashing down) and then finally and VERY important, put on the top covering ALL the chicken/spicy beef/onions whatever goodies your having, mozzorella cheese. VERY, VERY important. Pizza outlets always do this and insures that NONE of your topping is burnt/dried up, so make sure it covers your intire pizza (even if your not too keen on cheese, mozty is fairly tasteless).