One of the best free ways to generate traffic, besides IBOtoolbox of course, is LeadsLeap. As a free member you can generate traffic, leads, earn revenue sharing, earn 30% commissions on referrals that upgrade to PRO, as well as advertise your business and get free tools such as the Real Tracker, Popup Generator and OTO List builder, All of these tools generate a lot of traffic to your offers. Additionally, you can write a review of your business(es) as well. Check out the one that I wrote here on IBOtoolbox! If you decide to upgrade, you earn 50% commission and get free referrals. I have close to 300 members on my team with almost 100 personal referrals that I earn a nice monthly income from.
I also want to mention that you can put the LeadsLeap widget on your website or even on your IBOsocial profile page (Step 9 of edit your profile) to generate leads and even more traffic.