Go ahead and test your ideas! Business Ideas provides a good place to start: answering questions will produce a score for your idea.
|Learn by doing... and getting results!|
You got a good score? Then start working on your new idea. As long as you don't exceed the time you dedicate for it, you'll never regret it. A few hours may be sufficient if you remain in your field of expertise or if you ask for expert help.
You've started your project, now what? Keep working on it and test it now and again on Business Ideas. If all is well, you should be getting a better score!