Well, your question is vague, so I’d start by advising to research your target and focus your inquiries on one question or issue. I have no idea what you’re really asking, or what your interesting new job entails. Are you a consultant? Are you selling a product? Do you have a quota? Are you self employed?
There is so much to know about consulting. Jeez, now that I think about it, I could write a book.
I rarely hunt for new contracts these days. After years of building a network, contracts come to me now. In the beginning, when I first started out, I would research a firm or non-profit, target a person or persons from that organization (usually s/he makes decisions, little point in connecting with general staff). I’d research what that contact has done in the past - their former career, their writing style, what they’re into besides their job. This helps me personalize an email, which are usually short notes introducing myself and my services. Nothing pushy or salesy - just: “Hello Ms. Smith, I noticed you know my colleague Mr. Doe. We worked on blah project, which was great/interesting/a learning experience (code for failure). I also noticed you are working on blah project. If you need (name the appropriate service), look me up. Happy to contribute and offer references. Best, Michael”.
I cannot tell you how much work I’ve generated with that simple approach. Sometimes they respond a year later, but work is work.
I also maintain a complicated system of rosters and databases that track my clients, contacts, and proposals. I can’t describe it here, but I track everything, from email inquiries to business cards. It’s tedious, but hard work goes with the territory. When I meet people at conference talks, for example, I scribble a note on their card (date, where we met, what they look like, and interesting fact/s to help me recall their face). Then I translate those notes later that day in two spreadsheets, one that tracks that particular conference, the other in a general contact xls, which is sub-divided into coded categories.
The contact will advance to other xls sheets if I spot business or collaboration opportunities. Again, it’s complicated.
Anyway, those are the super basics. There are plenty of consultant forums on the net. Google around and good luck to you!