Lot's of this question going on lately on all of the boards. First you need to be prepared to spen A LOT of your own money getting your self out there so that you have some sort of resume....most call this resume a "sponsorship proposal":

The best way to write a proposal is to make it very organized and interesting. It needs to have a cover page, a table of contents, and introduction to your self or your company, stats on your car, your past coverage or at least your past event attendance, your schedule of events for the proposed season.....you get the point. Pictures always help (every angle of the car is best; front shot side shot and rear shot). It also needs to have what you are offering for what you are seeking out ie: gold level sposorship: $2k in product gets you a 12 inch sticker...blah blah blah. Be sure to point out what makes you marketbale and this is different for everyone. Remember that sponsors are looking for the best bang for their buck and that equates to the amount of "impressions" they will get for their money...or their "return on investment". YOu also have to remember that in essence you are beinghired to market for these companies. If you can market yourself with your package, thenthey will feel that you can market their company. Be sure to show up for any meeting or conventions (SEMA, PRI) well dressed and groomed. You need to be presentable in their presence. You are essentially applying for a job.

My table of contents breaks down like this:
Table of Contents:

3 Introduction
4 Batlground Engineering and Motorsports Program
5 Driver Profile: Daniel Willie
6 Driver Profile: Tracy Shayhorn
7 Vehicle Profile: 1995 240SX (The drift twins)
8 Vehicle Profile: 2003 Mitsubishi Evolution 8
9 Media Information
10 2006 Event and Television Appearances list
11 2007 Schedule
11 Marketing Information
12 Marketing/Advertising Opportunities
13 Marketing/Advertising Packages
14 Additional Considerations
15 Drifting Demonstrations
16 Contact Information