I'd give contrarian advice here. Some people suggest to "charge more" but this hardly works if you are just starting.
What worked for me is to keep jumping from client to client until you find a good one that makes up for the "bad" ones; with the bad ones not necessarily bad (as don't pay, sky-high expectations, bad communication, etc.. never take those) but rather clients that will have 2-4 months of work only.
The reality is, your consulting business will go two ways: Either you'll grow to x/xx employees; or it'll be just you. The difference is huge, and your responsibilities as well as your day to day job will be different. For the former, you are a manager and a seller. For the former, you are a software developer that need to have a small sales pipeline and keep in touch with an accountant.
I'd not advice on the former, but for the latter, just reach random people here or elsewhere. Somewhere along the people you reach, you'll find work for short periods, or small gigs. One of them will turn into a year long arrangement. It might seem risky that you are relying on a single client, so price accordingly for the down time. But address this with the mentality that your next gig will come from somewhere else. For me, when I was looking, it was a maximum of 1-2 months that I'd land the next gig. Usually shorter. Been at this since 2010, so maybe adjust for the current "down" market.
For the big fish clients (aka: Corporate Gigs) that some people here suggest hooking with, I'd suggest not to put much effort into that. The reason for that is simple: It's more about navigating politics, hierarchy, organizational complexity and bureaucracy. It can be lucrative but it can also drain you in the short time, these are also gigs that gets established with politics rather than skill. They can be draining until you get paid, and if you are short in cash (or need a fast money pipeline) this can turn stressful. I'd advice to push this for a later date.
It's also important to say that the first type of clients will rarely convert to the second type of clients. My experience is that the two categories don't overlap. So if you are about 2, (especially if you are looking to grow) and want clients that will be happy to pay for your airtravel+hotel+wine&dine meal, by all measures start looking for 2.