If you’re in the upper-middle class and are heading into retirement soon, you may need to make a few smart trade-offs. Though you may own valuable assets, multiple properties or lifestyle upgrades you worked hard for, that doesn’t mean all of them still make sense once your paycheck stops. Retirement is a shift from accumulation to preservation. And in many cases, selling some of your assets before retiring can make your money last longer and help you enjoy your golden years without stress. Here are six ...