You do things when the opportunities come along. I've had periods in my life when I've had a bundle of ideas come along, and I've had long dry spells. If I get an idea next week, I'll do something. If not, I won't do a damn thing.
The sad truth is that opportunity doesn't knock twice. You can put things off until tomorrow but tomorrow may never come. Where will you be a few years down the line. Will it be everything you dreamed of. We seal our fate with the choices we take, but don't give a second thought to the chances we take.