Build as much as possible in order to maximize profits. And don't wait up for the new ones to unlock. It's better to build what you can now and then later on take them down if you need extra space for new better booths.

When you start to grow be sure to have enough trash cans and toilets. Now, the placements do not seam to matter but players have reported that if you place the trash cans away from the crowds, you'll have less people complaining when they are full.

As in most games, once you are ready to leave instruct your staff perform actions while you're away.