Most of them are the same old shit. Lately I have been doing intermittent fasting so I don't actually eat my first mean until after I train each day. You would be amazed at how good pumps are when you train with nothing but water in your system.
The most effective stimulant pre workout is honestly just a pure caffeine pill. It is dirt cheap and works really quickly. Either that or just a cup of black coffee. Even then, I would only use it when needed. Say you had a bad night sleep or had to train super early for some reason. I really believe that food and/or water is all you need before training. It obviously depends on your goals.
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