Not wanting to rub anyone's nose in it, but I've just landed my 4th sponsor this year, hundreds if not thousands of emails sent, Over 60 hours of work gone into it...................is it worth it? Hell yes! Now got about $2,000 towards our towing costs with 6000 miles to haul this season.
The better at PR you get, the more unusal you are with the approach, the more success you get. One of my sponsors backed into my road car recently outside a shop, we exchanged cards, and now he is on board as a sponsor!