I don't cook very often, so I'm not much good with kitchen knives, chopping vegetables and whatnot. But when I do cook, it's generally gourmet. I make a mean cassoulet, f'rinstance. Beyond following the instructions carefully (by which I mean, reading them first to make sure you understand what you're going to be doing before you start doing it) and taking your time, my main protip is, do that thing kind of like in the cooking shows: Get all the ingredients hacked up, measured, sifted and whatever in advance in a bunch of little bowls. That way, when you look at the recipe and it says add the whateverthefuck, and you're in the middle of frying the stuff you're supposed to be adding it to, instead of dropping everything and trying to chop that shit up while the other stuff overheats, you just toss it in and get on with the next step.
For baking almost the only rule is, follow the ingredient amounts slavishly. Be anal and precise.