I've spent the last two months doing small 6x8" value / colour studies on pieces of MDF and am finding it to be quite a useful exercise I think. I got the idea from a video I watched called 'The Masters Mind' by Brian Mark Taylor, which I believe is based on the research of Anders Ericsson (https://www.amazon.co.uk/Peak-How-Master-Almost-Anything/dp/0670068764). He suggests studying a single area for 2-3 months for a few hours a day in order to see progress in that specific thing (as long as you're practicing the right way). I spent 1-2 hours on each of these, somewhat sporadically due to time constraints. Anyway, it's an interesting approach. Here are the practices:
They're not actually in order here, but I think there was an improvement over time. I found creating a small thumbnail five value monochrome sketch in marker before starting painting and then mixing my colours (just eyeballing the hue) to match those values accurately was a real help.
I was originally planning to do 50, but think I may stop before then. Has anyone else tried this technique? Thanks for looking!