Depending on you XP level you can have 10, 25, 100 or 200 spins a day for each spin you can win points and you get XP for it.
Beside the SLB you know can win points with Stumble rewards. You only have to click discover and you can look at website. With this you can random win 5 or 25 points, beside winning points you also get xp for every click on the discover button.
You also can do paid and not paid offers, like buying stuff or watching videos.
Doing surveys can be a nice and good way to earn points. I really like the surveys from PeanutLab.
They all start with 2 questions a kind of pre-selection. If this goes well you will at least earn 10 points up to more then 500 points per survey.
I hope these small tips will help you earn points in Superpoints.
Still not a member do it now and you will not be disappointed.