Finding business ideas can appear daunting, but it doesn't have to be.
There are already tens of thousands of businesses with a validated market out there: all you have to do is to imitate the business model while adding your own flavor. Originality is overrated. A butcher doesn't need an original business to stand out, he only has to practice his craft as best as he can.
Very few original ideas succeed, but there are tons of under-executed projects and under-served markets. The beauty of liberalism is that it's yours for the taking–as long as you can add value.
It's even more effective when you combine existing business models in a new way. That's what we call innovation. Innovation is not invention, it doesn't require uniqueness per see. It means niching down, or delivering a better experience, or providing something only you can do. Same same, but different, as the movie goes.
This is why it's always interesting to regularly browse websites like Product Hunt, AngelList, or Crunchbase. Opportunities are many, the only problem is choosing the right one corresponding to your experience and execution skills.