Your success depends on a lot of things so the answer to your question will be a vague as the question itself. Do you have a unique idea that you want to promote, do you want to sell stuff, is someone else already successful doing what you want to do, et al ?

If you’re looking for the Goose that lays the Golden Eggs, you’ve got to grow the Goose. You cannot shortcut this process. Research and planning are your first steps. We meet too many clients that just put up a site and expect it to work. That is the functional equivalent of a billboard in the middle of a cowfield…no traffic equals no response.

Here’s a way to think about your strategy:

Direct: Go head on against the biggest players that are established in the field that you want to compete in. Expect to get bloody and probably go broke doing it. Not recommended unless you have 3 times the wealth of the competitor you want to bury. Even then, it’s pretty stupid.

Indirect: Take a stealth approach. Find less obvious markets that need your products or services but might not even know that this type of product or service exists. These customers are the ones that say "Wow! I didn’t even know you could do that!". I LOVE this approach.

Divisional: Find the weaknesses in your competitions products and services and build up your business around them. You’ll be able to "pull-through" some of the more competitive orders after you’ve proven your worth. You can also use divisional strategies geographically. Promote in geographies that aren’t well represented by your competition.
References :
http://www.wsiNetReturns.com
http://www.businesswebmarketer.com