I recently read that doctors are taught how to be decisive, a critical skill, by learning a simple thought process:
Identify the problem
Weigh the options
ACT
Easy, right? In the end, it really is.
For doctors the wrong decision could be fatal, but for us what is the worst that can happen? We pry up that wrong piece of glass, or change a color, or layer something on top. The more we practice the less likely we are to need a remedy, but better to learn to correct than be stuck in indecision.