I used to love pre workout supplements, especially the old Jack3d formula with 1,3-DMAA and Shizandrol A, both of those combined ...
Sympathomimetics and CNS stimulation ftw. Powerful stuff. Shizandrol A also has very potent dopaminergic inhibition.
You can buy Shizandrol berry extract/powder. That and a touch of caffeine ..powerful and not to be underestimated. You'll feel on top of the world.