Did you call or text the hiring manager when you applied to the project? Show contractors that you are eager to get to work by reaching out to them.
Do you have a fully filled-out profile? This serves as a personal resume of your work. Before they even call you they will take a look at the work you do. Profiles with profile pics, a bio, and a gallery of your work are the applicants that get hired!
Also, take the time to connect with the Project Poster. Once you are accepted into their network, you are more likely to get hired for future work. Profiles with lots of quality connections look good to hiring managers too.