Seth's point is so right-on - setting yourself up with a rich Internet history will go a long way in securing your future. Start with a blog - or a twitter stream - or a Tumblr - but start NOW.

or you could spend your time making something people want :/

it doesn't take much time to contribute something back to the community, whether it's advice on your blog, contributions to open source software or just releasing some of your own work as open source. It will only help later on when you have an actual product/business to launch.

Yeah I agree, it's just a matter of balance I guess.