Pretty sure it's mostly placebo, so find some edibles marked "sativa", pretend the strains didn't get irreparably mixed during prohibition, tell yourself this is better for creativity and energy, then take a smaller dose and hope for the best.
Edit: while I've never seen it, it's not impossible to imagine edibles with caffeine in them as well. Or to take some caffeine close to when your edible hits. I like to start some weekend mornings with a big pot of strong coffee and a bowl, and I tend to get a lot done those mornings. Although, I was cleaning, doing chores and cooking on Sunday morning before I started my little ritual, so take from that what you will.