Sometimes I get lazy and don't paint. I found the reason I do that at times is because I don't always have in mind what I want to paint. The problem solves itself when I have several canvases on the go at the same time. This may work for you too. At present I have about five in the works.
Do you ever tweak old paintings that you have had lying around for years that are not quite up to snuff? I do. As the years go by I learn more and when I look back at some older paintings I have to either burn them or tweak them. Mostly I tweak them. Sometimes they change completely.
If you keep your paintings smooth, tweaking them later is no problem. Remember though, you can't paint acrylics over oil but you can paint oil over acrylics. So you have to know which is which. It's hard to tell the difference.
