Bristol Palin and Levi JohnstonPop-Ed: Bristol Palin and Levi Johnston are making headlines again. First came the shocker that they got engaged a couple of weeks ago, although their parents, including Bristol's famous mom Sarah Palin, don't approve. Then came the news that they're shopping a reality show around.

I like to think there's hope in everything, but let's face it, this situation seems doomed. It's hard enough for a young couple with a small child to make it, but throw in the conflict with their parents and the fact that reality couples rarely ever survive -- and their prospects for happily-ever-after seem slim. But let's stay positive here and take a look at what Bristol and Levi can learn from other reality couples.