Two types of decisions in your startup

Reversible decisions are questions like picking the logo, whether or not music should auto-play, how to describe the product. Decide these in the same meeting they are raised. 

Irreversible decisions include who to take funding from, which supplier to sign the contract with, who to hire. Take your time with these.

One reason startups seem to move with such blinding speed is because they don't need three layers of approval for reversible decisions.