I've found the best way to screw up a plan is to write it down as a plan. If you do that you can almost guaranty that it won't go that way. The best thing you can do it to think it through in your head, build it in your head, going through all the steps. A lot of times I will find that something might be a problem. Especially when dealing with 3D spaces and projects. Interference is common when working in 3D. Like you cant have a drawer on 2 corners of the same cabinet, don't laugh, I've had people ask me why I can't do this for them. When you make your plans make sure you don't commit them in stone, things happen, things change, especially if it is something you haven't done before.