I find that you have to wait until the mood takes you. Odd really, you might think painting is just painting. Not my experience at all. I have to want to paint whatever it may be.
Very true but i am fortunate/unfortunate to work overseas, away from home so I have many spare hours everyday and the painting keeps me sane and relaxes me. It's when I'm home with the family that time just vanishes

Also, like most wargamers, I have a very large lead mountain awaiting my attention. 15mm fantasy, Napoleonics and Italian War are filling my time at the minute