If you don't have some combination of an amazing v1 product, a traction graph that's moving in the right direction, credible investors already on board, a big/timely market, or a top 5% team, you're almost certainly fundraising too early... And you should do whatever you can to get one or more of the above.
See: http://andrewchen.co/2011/06/21/video-the-anatomy-of-a-funda...
(note: salesmanship can trump all of the above)