I've been deliberately studying composition for two years using a specific method I want to share because it produced faster improvement than anything else I've tried.

The method: collect fifty composition thumbnails from artists you admire. Small, simplified versions — just the value masses. Then analyze each one for the compositional strategies being used.

What I found: most compelling compositions use a small number of identifiable strategies. Diagonal tension between two major masses. Figure-ground reversal in part of the image. Value gradients that direct the eye. The rule of thirds is one strategy among many, not the comprehensive guide books make it seem.

The transfer practice: before starting any new piece, I do three five-minute thumbnail compositions and identify which strategy I'm using in each. I pick the one that best serves the subject and commit to it. My composition improved more in three months of this practice than in the previous two years of drawing without this deliberate framework.