1. Information Products - it could be ebooks, "how to" videos, cassettes, magazines, newsletters, paid e-zines, courses, etc.

2. Advertising Space - it could be banner ads, ezine ads, ebook ads, magazine ads, newspaper ads, tv ads, fax ads, online classified ads, etc.

3. Web Hosting - you could offer a free advertisement for their web hosting service on your site in return for free or discounted hosting.

4. Software - it could be for tax software, web site authoring software, accounting software, newsletter software, graphic design software, etc.

5. Writing/Editing - it could be for web site content, promotional articles, press releases, e-zine articles, promotional ebooks, etc.

6. Accounting/Bookeeping - you could offer a no cost advertisement in exchange for their accounting and booking services

7. Consulting - it could be market consulting, legal consulting, computer/software consulting, business consulting, etc.

8. Copy writing - it could be for brochures, business cards, classified ads, sales letters, product packages, banner ads, promotional products, etc.

9. Merchant Accounts - you could offer no cost insert ads in your product packages in exchange for the option of accepting credit cards.

10. Internet Access - you could offer a no cost pop up ad on your web site in exchange for free or discounted Internet access.