The Simpsons are taking iPhones, iPads, and other iDevices by storm in the new free-to-play game, The Simpsons: Tapped Out. If you're up against a wall and it's taking too long to make it to the next level, there's one thing you can try to increase the rate at which you make money and XP.
The open levels of the game teach you how to build houses and manage the citizens of Springfield, but one thing many players seem to overlook is that you can build multiple units of the same house to increase your cash flow. The brown house, pink house, blue house, and white house can be built multiple times to maximize revenue in your version of Springfield.
Plant multiple versions of the brown house in open space if you like to check in on Springfield frequently. The blue and white houses take longer to generate cash and XP, so only plant multiple versions of these expensive houses if you check in on Homer and his neighbors every few hours.
If enough houses, you can easily reap a ton of cash and expand your lot size, add trees and other amenities that increase your Springfield's rating. That in turn will generate even more cash and XP. It's a never ending cycle! Just like a donut. Mmmmmmm donuts... haaafggggghhh....