This is probably a very boring, conventional answer, but I’d point to film festivals. Getting your work seen at Sundance hugely increases your chances of finding a distributor or an investor for your next film. For the time being, Sundance, Tribeca, Cannes, etc. are still the places where industry power congregates. But it can take a lot of work to get there.
Another thought is to step into the curator role and support other indie filmmakers (and their audiences). That builds crediility, expands your network, and earns social capital.