Struggling to find the "perfect" idea to pursue? Spend less time focusing on "perfect." Pick an idea that interests you, addresses a pain point that you are familiar with, and / or grows your skill set in some way. Even if it's not "perfect," even if it's something that you later decide to mothball, the time you spend may lead to better ideas and opportunities.
Still stuck? Use one of these for inspiration.
Still stuck and don't like one of these ideas? Randomly pick one as a starter. Then write down 6 variations of it. Keep iterating.