Yeah the best way is as said, provide a service that people are looking for and don't make it something extravagent that costs loads. Plus making it creative, yet not to creative, is also a good little idea.
I host my own website and came up with the idea of providing free information while having a place for advertisers to advertise, at first it went kinda slow.
Then I looked at it a bit and thought what people really want, i.e. what I would want and came up with the BIG $$$ idea, now it is starting to intrigue people a whole lot more than it did before.
Point is, find a service or something that people want and are willing to pay for, plus if you can give them something in return on top of the service, like my BIG $$$ idea, it doesn't hurt.