You may want to start with the realization that most grant applications are available to you for free. You will need to read the RFP (Request for Proposals) carefully to determine if your scope of work is applicable. In some cases there may be a minimal application fee. Make sure your application for funding is presented well and follows the guidelines to the letter. You will also want to plan for the minimal amount of funding that can be allotted and cross your fingers for the maximum amount you are requesting.