there are many.... i saw someone made a list above...
most effective would mean choosing the right websites.
Example, if you are going to do article directory submissions, do it on sites with good standing, on sites with actual readers, and the like. For bookmarking, choose only the top ones. Don't be swayed to making hundreds of accounts from sites that people don't know about.
- Wholesale Advertising Vinyl and Cloth Banners, as well as stickers, labels, car wraps, and signs.