First I think this is a great I day, A Skate/Surf/Snow Clothing line. I am glad I found this tread. Let me ask you something, are you flow sponsoring any Skaters at the moment? If you don't know the answer to this question, don't get into this business.
Ok lets say you haven't got to doing that yet, first go to your local skate park and find a skater to flow sponsor. I am not sure what style of skateboarding you like, but I look for people who are into going big, large grinds, large airs/ollies, gaps and other things like that, but maybe you are more into techincal skating, which is fine.
After you do those things, you should look for a partner.
As for me, I never thought about working in the clothing business, however I am a Motocross racer and I know lots of Skaters, BMX riders, MX racers and more. I may be able to help.
"Everybody wants to be number one... but when it comes time to doing it and making it happen... they don't really really want it!"-Ricky Carmichael