January 4, 2011 5:54 pm Tips to Keep Weight Loss Resolutions iVillage‘s Kelly Wallace talks about the “Rev Up Your Weight Loss Challenge” that has thousands of Americans working to lose weight in the New Year. US & World Videos 3:04 PurpleStride event in Philly raises money for those battling pancreatic cancer 3:27 ‘Take a Breather' and run to help battle against cystic fibrosis 1:49 How much time do you spend on your phone each week? Keith Jones, Erin Coleman talk screen time 2:52 Join the fight for ovarian cancer treatment and research at the Sandy Sprint 3:13 Movement, memory and Parkinson's awareness