It may be time for you to retire! A good rule of thumb is to retire once you can Double your followers. Although retiring resets your cash, lobbies, and staffers; it also grants you a big bonus to all your lobbies when you start up again.
This means you’ll level up faster, and will hopefully, produce enough money from your Lobbies to reach a higher level than before you retired.
For more gameplay tips, check out the Kongregate forums!