i know i'll get flamed for this, but ok
sponsoring is in my opinion more a thing of personality than of skiing. see, what does a company want from you, how can you little kid help a company (i am studying economics). you have to be able to endorse your sponsor, to ensure that you give them back the $ they gave you. ok, you have to be a good skier too, but its not like dub cork 10 = free skis.
in my opinion, companies are way to loose with their sponsorings. i am pretty sure that it is right now a very tough business and i dont get how you can sponsor 10 kids that are somewhere in the area "switch 5 to one ore two ungrabbed doubles" at best (a company here in austria).
pretty much what ive heard is you have to be a good strong rider with your skills and stuff but also you need to be able to stand out, to not be a douchbag to people and to pretty much give their company a good name whether it be with your riding skills or personality.
Get grabbed 10s, pretzel 4s, all flips with some steeze, and market yourself well in comps and such. Thats your best shot from what ive seen.