I'll answer the question you asked.

You want sativa strains. Indicas will make you heavy and tired - sativas are a head high and will let you get on with stuff - most hazes are sativa, some of the skunk strains are sativa dominant, durban poison is another good one.

Strains that are pure indicas or indica dominant are the ones you dont want if you have to get stuff done - strains like white widow, white rhino, northern lights, k2, kush, afghan strains are mainly indicas, hash plant.