Discuss what is expected on both sides

Don’t accept a project without discussing what is expected on both sides. 

Make sure you understand what your client wants you to do, how much time they are giving you to do it, and to what extent they expect you to include them in the process. If you think their expectations are unrealistic, discuss alternative timelines or adjustments to the project.

It’s a good idea to give each client a written copy of your process, including milestones where you’ll expect payments. This will keep them from calling you to ask about the next step, and it may prevent payment delays.