I mostly keep a sketchbook near me whenever I get this urge and it honestly just made me realize that my technical ability could never meet the expectations of my imagination but I still would be able to draw something rather than nothing at the cost of procrastinating whatever my task is at that time. But sometimes when it’s impossible to pick a pen and paper, thinking about drawing is rather counterproductive which I’d basically recommend the alternative and it’s to intently observe a subject matter around you and think about how you would go about drawing it. Or find a subject matter you’ve been struggling to draw and look for a real life reference. An example would be folds and drapery or candid perspective.