Aww, thanks!   

I’m finding some of them easier than others!  I have to learn to resist some temptations a bit better, but this is wonderful practice, I’m delighted this meme exists.

I don’t know what you’re having the hardest time with, but in general I find it helps to try every color as a background color and just put down some squiggle and texture to see how the colors interact.  It’s often easiest (though not always best) to use the middle color as the background, then you have two shadows and two highlights.  Again, easiest, but not always the most interesting, challenging or artistically awesome.  But a good starting point~  

Good luck~