The first they thing you must do is learn the scanner that the first thing I did. So when you do make a change you you what to watch. Another good thing is the tune repository NEVER FLASH ONE OF THOSE TUNES IN YOUR TRUCK however it is a good way to see what some people are doing so you get a better idea of what to do. Make small changes that way you can see how thing react to the changes. ASK questions there is no such thing a a stupid question when it comes to tuning, there are more than enough people who are willing to help you. I have only been using HP tuners for little over a year. If you or any one else has a question just ask it the best thing you can do.