If doing sales sounds tough, it will start tough and then get easier. If people ignore you just keep going.
Build something for someone for free (assuming you are in a programming or similar field).
When selling the most important part is the immediate benefit you are providing - will you reduce your customer's cost, improve their sales, solve some problem they spend too much time?
RE: how do you find clients? What field are you in? Who would need your service? Identify 1000 potential buyers and contact them. Contact them by email, phone, use forums, go to conferences, talk to people one on one. Introduce your benefit to them.. Make sure you contact people who seem to have budget and good things going on. Build a website on wordpress that describes your service. Hang out in places where your audience might be.
There is a lot to talk about but most importantly you "do" something consistently, improve it and keep going if you get Nos. If you stop doing you will never get there, and if you keep doing you will definitely get somewhere good, then great.