Link to this offer every time you have any related content.
If for example you're selling a low-priced course on the WSO, add a banner to your download page and treat is as a 'bonus' for your customers.
If for example you're giving away a free report on how to get traffic with Twitter, Social Bookmarking, Articles, etc. (just Google 'traffic plr') you can add a link at the footer of every page to Trafftastic through your affiliate link. Your link will say something like... 'FREE Video Reveals 24 Hour Traffic Plan... https://www...'
You can also use this technique to add a bonus section to your free or paid report. Add a 'bonus' advertisement just after the front page or after the disclaimer, and add another at the end of your report and link to your affiliate link!
Create a sales letter for your paid report and then offer Master Resell Rights to it! Get resellers spreading your affiliate link for you! Want to take it a step further?... Offer branding rights so they can customize some of the links and pages inside your product (except your affiliate link).
Do you already own a membership site?... Then add a graphic to your login and logout pages! You can make money just placing a banner and completely forgetting about it!
Do you already have a squeeze page where you're collecting new leads every day?... Then add a graphic to your thank you page or confirmation page! Your new subscribers are ACTIVE and have just filled in their details - they're most certainly going to click an attractive banner!