Number one: stop using volume measurements!! get outta my face with these cups, teaspoons, fluid ounces bullshit. Cooking, like chemistry, is a mass-based skillset. You should be using a scale for every possible measurement, because it's accurate. Let me give you an example:
You have a bag of flour and you take some pinches and gently dust them over your precious imperial cup to make a cake with. Sure it'll take forever, but when it's finally full, weigh it. Now, scoop some in there and pack it down as tight as possible, hell, get a little tamper tool like pipe smokers like to use. Then weigh that bad boy. Ya think they're gonna weigh the same? Additionally, using a scale means you don't have to clean any of that crap up later, just the bowl you put stuff in. Maximum efficiency.
Bread is a tricky animal, but with the power of mass ratios, you have nothing to fear.
I found a great website by some vietnamese lady here that tells you pretty much everything you knead to know about bread ingredient proportions. They are as follows: