Here's the method I used to build myself a consultancy business: buy a 9.90€ suit jacket at h&m, a 0.80€ pen and a moleskine notebook.
Wake up at 7 the next day, start knocking doors and sell your services to every business in town; the trick is that you can't go home and eat until you have at least a prospect client.
Don't cold call, don't send emails, don't print business cards. Knock doors while looking professional and competent, you'll get clients soon.