I'm constantly getting startup ideas. It's always been a problem for me as I often lose focus on the current project and want to jump ship onto the next idea which has me excited.
How can I decide on which idea to work on? Lets assume there are 3 ideas that I'm excited about to work on. How to figure which one to work on?
I see a couple of ways that you could approach this. First, you could do a round of idea validation on all three of your ideas. Maybe start with the Business Model Canvas or Lean Canvas and try to capture how you see each idea working. Then figure out what the simplest way possible to validate each of those ideas. It might be as simple as buying three domain names, setting up little teaser landing pages for each of them with Launch Rock or something, and then waiting a month or two and seeing which one has the most interest. That's a good first step to pick one of your ideas that may be the most viable/likely to bring in real money from real customers.
A second approach is to just go with the idea that excites you the most and just go after it. You'll have to do the legwork to figure out what works and doesn't work with the idea and pivot accordingly, and just keep trying until you pivot into something that works.
The hard part here is not in choosing an idea, but in doing the work to build something out of it. One mediocre idea that is executed well will always bring in more money than a dozen brilliant ideas that only got partially complete before the creator got bored and moved on to the next brilliant idea.
As a founder, you do have to be good at coming up with ideas and creative solutions, but you also have to be good at sticking with a gigantic task until it reaches completion, no matter how hard it is. The latter is far harder than the former.
Whichever one you're most passionate about. The others you'll lose interest in before you even get to them on your list.