To tell you the truth, There is a lot to it if you really want to get into it. There are countless videos on YouTube to do stuff with, but I don't have a bowpress for the big ticket items. My buddy owns a bowshop, so I know how involved it can get when you start trying to time cams, and compensate for stretching cables/strings. Look at some videos on bare shaft tuning, and build a paper trap... I keep one arrow out of every dozen I build bare shaft literally as my tuning arrow.
If your bow has been set up prior, just keep performing maintenance checks on it. What I do, is a simple tune in my basement many times a year via paper tuning. If things are changing quite a bit, I know it's time to look deeper.
Once a year I go to my buddy n have him look the bow over. This year I'm due for a string, so it's gonna get fun as far as maintaining tuning.
It's not a hard thing to maintain if your setup is solid from the start. The archery talk forums are a great resource if you can sort through the arguments