Having a Facebook badge on your affiliate website or other page shows visitors that your Facebook page exists, as well as what you have happening there. This is another way to grow your number of engaged Likes, by getting your Facebook page the attention of people who already approve of your site. Check out Facebook Badges to find out more about how to add a Facebook badge to your site.
Considering that you have a finite amount of time, passive income should make up a large part of your work. If you're serious about generating any semblance of income online, then passive income should be one of your sole goals and ambitions. Why? Wouldn't you prefer to do the work one time and get paid repeatedly as opposed to relying on your time to generate that income? Invest the time at the front-end so that you can reap the benefits on the back-end. This means putting in a bit of sweat equity and not getting paid today. Rather, you'll get paid somewhere down the road. And you'll continue getting paid whether you keep building that passive income stream or you stop.