There's an old rule in small business: "Pay yourself first." It means, make sure you allocate money to pay yourself before paying everything else. Once you are used to it, it makes it a lot easier to get to something that seems like market rate.
When taxes, salaries, and expenses come due, those need to be a priority, so before any money flows in or out, have a plan for how to set your own salary at X% while also meeting those commitments.