Just keep in mind that you need to have targeted audience, just like in any other business. For this reason, i would suggest you choose any of
the related options; forum auction ads, signature campaign, or any of the advertising services that are targeting bitcoin audience.
cheers
I'd be curious to know about the profitability of forum ads (the ones that are auctioned off). I've always wondered. Signature campaigns can be pretty cheap to run, although it has it's drawbacks -- signature spamming/low quality posting that can be sometimes difficult to detect without manually checking on participants on an ongoing basis. But for a lurker like me, I have to say that it's been effective on me for getting names out there.