Most of us (artists) tend to work on the fly, unless we are full time artists - we'll tend to be more mindful of allocating time to paint. However, I've noticed in my own life as an artist that having a process in place makes all the difference in the world when it comes to getting things done and moving forward. Try to put a process in place as to how you do things...I know that it does not come natural to artists, since we tend to be more free and emotional about how we work. However, if you want to take your artwork to the next stage, you have to be willing to do things differently.