You usually go in and find the best seat that suits you. One you think you're most comfortable with. In my case, at the window side, somewhere in the back part where there's a curtain that can cover the sun light that passes through the window. You set yourself in and do your best to relax. Get the best music from your iPod and slowly, while paying no mind; after the conductor asked you to pay and the vendors gone, you doze off to dream landia hoping to get a deep sleep until you reach your destination - My usual bus lullaby.