As your relatable fitness, health, and happiness guide, we at Greatist strive to bring our readers amazing content on daily basis. Of course, not all of the best stuff comes from us! In this week’s link roundup, we highlight our favorite can’t-miss videos, articles, and opinions from the interwebz:

The Washington Post — Using Social Media to Track Runners

Ever wanted to Tweet and run at the same time? New app lets you track marathoners' progress.

All Women's Talk — How Color Affects Appetite

We eat and drink with our eyes, so the color of food may help to determine what we choose to eat. How does your favorite color stack up?

Rodale — Can Eating Healthy Save You Money?

A new study suggests shifting food dollars to beans and grains gives you the healthiest bang for hard-earned bucks.

TIME — Why Dieters Can't Keep the Weight Off

A look inside the science of yo-yo dieting.

Glenn Pendlay — I Find Your Lack of Faith... Disturbing

Lessons for gym-goers from the Dark Side.