Stores can be located using the map. Stores which you've robbed will have a checkmark on their map icon. This can be used to keep track of which you have left. Walk in, point a gun at the cashier. If you fire the gun, make sure it has ammo, or the cashier will open fire on you. Yelling through your mic will fill the intimidation bar more quickly. Once the intimidation bar is full, you will get your cash and be left with cops to evade.