Seriously, this isn't difficult. If
I can do it...
It really helps to use a spreadsheet. Seriously. Massively. Impossible without it (IMO).
1) Go through your pantry/fridge and find all the stuff you like to eat that's mildly healthy for you.
2) Enter the nutritional data into your spread sheet. This part is tedious but it's a bit of a proving ground. If you can do this, you can lose the weight / gain the muscle (depending on your goals)! It sucks. I know. Just do it. Do it a little at a time if you can't take it.
3) Make a table with summations in it. Then make a row that figures out percentages. Keep in mind 1 g fat = 9 calories, 1 g of carbohydrate/protein = 4 calories.
After that, add your stuff and have fun. Because it's a spreadsheet the percentages should update automagically.
This is
exactly the procedure I followed. Maybe it's not the most effecient, but I've been eating 40/40/20 (or close) all week and it's been pretty easy. I think part of the key is to
use food you already eat. Just realize that you'll have to limit it. Also, document
everything. If you cheat, make it glow on your spreadsheet, so you always see it.
If you need help with Excel, just say so. There are several spreadsheet threads and I can help if you want.