Everyone posts links on Twitter and or Facebook and every site except this one has a blogroll. These are excellent ways to provide a little link juice to sites you like. We can do a little more though.
In my old days I ran a self-hosted wordpress scraper that aggregated links to scifi, cartoon, and comic book articles. It ranked pretty good on Google and made me about $100-$150 every month. That isn't great money but it was virtually free so I didn't complain.
The main reason it did so well was that I created a small private blog network for myself on just about every free blogging platform I could find. Google has updated it's algorithms now so this generally doesn't work quite so well and I personally think it shouldn't. I've since discovered that being a shitty scammer isn't cool...
Links should be natural and organic. That's why I advocate posting links to friends sites on your small blog network. A site with links to articles you like added over a period of time is real and not spammy.
Go share the love.