[davismwfl]

The best way I found when I ran mine was to network. Trying to get jobs from advertising and marketing is an expensive way to do it, and you will go through a long and expensive learning curve. Best thing for consultancy is to keep the queue full and to do that you need the networking going 24/7. Use existing clients that are happy with you to find the next client. Do this while the client is happy with your work.

Some people I have talked to about running a consultancy think they will never upset or disappoint a client, don't fall into that trap. You could do everything right and still have a client pissed off cause their coffee was too hot, shit happens. So after a few weeks, the client is happy with you and most importantly you have delivered something to them, pick the right time and ask for recommendations or introductions to other teams or companies. I found a ton of work that way. Even when I would have the unavoidable client that was a douchebag in the end, I usually got at least 1 reference that led to work. I got better about client selection as we grew since we could be more picky, so that also helps a lot, but in the early days you generally don't get to be as picky as you'd like.

If you have specific questions let me know, I did it more than once, with two successfully exited as product/consultancy companies. Others here have done similar so hopefully you'll get other opinions too.