loyolabenson had a great idea.
This will sound a little loopy, but it actually worked pretty well when I did it about 2 years ago with a Clickbank product...
Get your visitors to opt-in to a mailing list. As loyolabenson mentioned, offer exclusive games or something that really gets them excited.
Create an autoresponder sequence ahead of time. Dozens of messages. Make 'em short and punchy. Use great headlines that drive high open rates. The goal is to get your list to open the email, scan the contents and click the link.
The link should send them to a page that makes you money. Sometimes, it'll be a merchant. Sometimes, it'll be a lander on your site. Sometimes, it'll be a quick tip laced with Adsense.
Hit your list with one message per week (no need to pummel them). Or, mix it up so they don't get bored, expecting your messages on a certain day.
Now, here's the kicker...
Instead of the boring messages that simply promote things, create a character. Someone that your audience can identify with.
Then, have your autoresponder send the messages written by that character. He/she could be funny (hard to pull off in email), sarcastic, edgy, cute, etc.
Each message could just be about 100 words or so and say something consistent with the character you've created...
"Oh my gosh. Yesterday, my boyfriend told me about this awesome game! He thought it was silly, but I'm absolutely hooked! It's totally free and I want you to try it. But, I lost the link to the darn game. I know it's somewhere in my email.
"I promise to find it tonight and send you the link tomorrow, Tracy. You're SOOOO going to love this game!"
- Trademark again. I forgot to mention something. Get their first name for the opt-in. That way you can make each message sound personal.
And that's it. Then, in your sequence, set a message to go out 24 hours later containing the link with some more tripe.
Load your message sequence into Aweber (or whatever autoresponder you choose). You could literally have an entire year of weekly messages going out to your audience.
When I did it, I was actually buying my traffic and sending them to a lander driving the opt-in. Overall, my opt-in rate was about 25%, I think (though a few keywords were consistently getting opt-in conversions at 60%+). I remember my ROI (after pruning some keywords) was around 70% or so. Clickbank ultimately chucked the main lead product, so I killed the sequence. But, my sequence went for several months and promoted different products throughout.
I don't know much about your audience, Bob. But, it could work. Sorry for rambling my way through. I hope it gives you an idea or two.
If you could pull even a 10% opt-in, that's still several thousand subscribers on your list over a few months. In each message in your sequence, tell your reader to forward stuff to their friends. You'll get a lot of collateral leads that way.
Sorry I went on so long. I was actually getting a little nostalgic about my own experience a couple years ago with this.