I'm the CEO & co-founder of SponsorMyEvent, the marketplace that matches organisers and sponsors. We have launched our platform a bit more than a year ago to solve the everlasting problem how sponsors and organisers can connect in the most efficient way possible.
Throughout the months I saw so many requests for sponsorships that were poorly written, presented in a less than perfect way and sometimes simply funny to read.
In the meanwhile I spend some time writing blog posts to help organisers to tuning their proposals (blog.sponsormyevent.com). A short e-book that will serve as a handbook for organisers will be published very soon as well.