Try any pure sativa strain. I like Jack herer myself and it's very widely available. Ask your local dispensary for the purest sativa they have, because any indica or some balanced hybrids will get you a bit tired.
The more potent the sativa strain the more likely you won't experience drowsiness. Cactus Cooler, Chocolate Diesel, Pineapple Express, and Jack Herer have received rave reviews from our customers with regards to the energy it gives them while at the same time not inducing sleepiness. Our menu of strictly organic and vegan medicinal flowers is deep enough for you to find the perfect strain. We hope this helps!