I work all hours- I do not have the typical 9am-5pm. If you consult with me about a task, I schedule you into my week, where it works for us both. I talk to people, no charge and tell them about who I am and what I do, and if what they are looking for is something I know I can help with. I am not too proud to tell someone I do not have the expertise to help them.
I do draw up a contract, asking for a small retainer first, which goes to last invoice (or only invoice if that is what project entails) and I ask for any edits in my contracting agreement to tailor to the clients needs. I am flexible with payments, and how I am paid, but I do send out the invoice on a particular day every other week, which is negotiated up front in the beginning.