Coming up with ideas for entrepreneurs isn't really a problem. Execution on the other hand, as I have experienced, is by far the hardest thing to keep on top with, especially if you have to keep your day job.
Since I was able to read Lean Startup by Eric Ries and Running Lean by Ash Maurya, executing startup projects don't have to be as explicit as it was before, but I'm struggling with the execution part since I wanted to do about 3-4 small projects. I don't just jump to execution, by following the risk management using Lean canvasses I make sure that I'll be building something that someone will want and has a business model.
In your perspective/experience, is it bad to juggle small projects from time to time? I've read a part on Lean Startup where Aadvark started by doing several projects to validate their idea(s). That said, I'm planning to do the same.
I believe that focus and perseverance is important in making ideas happen., but I still seek some advice on my plan.
If you have a full time job and are doing these projects in your spare time I would recommend focusing on one good idea / problem you are trying to solve. Especially if execution has been a problem for you in the past. Some people may be able to juggle multiple projects across a team to validate solutions for a specific problem or industry.
But, as an individual with many other things going on I would suggest taking your best idea and focusing on that and following the Lean principles with just that initially.