Yep, you'll get better. In the meantime you should pick up a few organizational practices. For example before starting a tricky piece of code I like to list ou

Yep, you'll get better. In the meantime you should pick up a few organizational practices. For example before starting a tricky piece of code I like to list out as many edge cases as I can think of (this is like TDD, but you don't get tests at the end). Or when you're trying to debug something make a list of every scenario you can think of that will lead to that bug. In time this will sink in and you'll automatically know where to look when something unexpected happens.