When a firm is submitting a proposal for a prospective project, it is important to make sure it looks very professional and that it stands out from the competition. One way that I've found to do this is by creating custom tabs that separate the different sections put forth in the RFP. Rather than having generic, bland, boring tabs, I like to design custom tabs and flood them with bright vivid imagery relative to the project experience of the firm, or their professionals out doing similar work as would be required for the project. Custom tabs always require a lot of forethought, because they usually must be sent to the printer at least a week ahead of when the RFP is due, so the printer can print them up and send them out to be die cut. So, this is one of the first things that I usually get done when putting together proposals.