The urban ranger is a very nice, KISS, elegant, idea.
Lin's system is also pretty elegant too.
But if your time constrained (like you MUST use the car and walking for an hour a day is not a time option) and want something that works, is pretty KISS, and works really well and would only take about 10minutes / 15minutes of your day (and also don't have to pay anyone money and not have to make exercise plans because it's done for you, already, all the time). Do crossfit:
Welcome to CrossFit: Forging Elite Fitness