Stop old people from falling - barefoot walking could help our elders from falling. Reminds me of some trainers who recommend you warm up barefeet as it helps attune your body and mind.
The Scientific Process - a nice guide on making you a better reader of scientific papers
Losing fat while maintaining muscle - provided you aim for ~1lb of weight loss a week, losing fat and gaining muscle can be done concurrently.
Getting your sleep is important - yet another study that implicates lack of sleep in making it easier to gain weight.