What are some ways to support entrepreneurs?
One obvious step is joining their startups as employees. But any other ways?
Bring people together and increase the chance of "luck" happening. This is extremely exhausting though and a lot of work in the beginning. I know a couple of people who are like that and it just comes natural to them.
In the end, this is being entrepreneurial even if you don't make money from that. You could call it consulting..
Depending on where you are there might be regional groups or (non profit) organizations who specialize in that kind of work. Always worth to check that out.