You might want to read the NEMO white paper
Creating a Killer Team Packet - "The purpose of this whitepaper is to help teams create clear, professional packets to solicit sponsorship, from materials selection to color choices." and
25 Ways Sponsors Can Help Your Team - "Lists 25 ways that sponsors can give to a team in non-monetary ways. This can be used as an additional piece in a sponsorship packet, or on its own to work with a sponsor to find creative ways to give to the team."