There are days where I don't want to draw. I don't have an idea to work on. Often when that happens I try and force the issue, even if it is just a ten minute interlude of something creative. Sometimes good art starts from that nugget of time. Many times I just slog through it then relinquish to the lack of focus. I truly believe that forcing even that ten minutes pays long term dividends. It makes me stay on track. It keeps me from putting off goals for tomorrow. Just that simple act of forcing myself to work for ten minutes on a day I don't feel like it, helps me to see that I am chipping away at a bigger objective.
Have you ever either A) wanted to get into an exercise regimen, or B) wanted to get back into shape? Did you think that the hardest part was starting? If so, than what I am suggesting buys into the logic that if you keep moving, even just a little bit, it is easier to stay moving. Call it one of the laws of motion. Call it determination. Whatever you call it, this simple act will be one of the most important skills to help you make your dreams come true.