Do you have issues with your feet? I do not but I try to read any running books I come across and Ready to Run by Dr. Kelly Starrett is one of the best books I have ever read about preventing/fixing running injuries and in reality, any nagging foot problems. He is a physiotherapist who is all about mobility, movement, and conditioning and works closely w/professional sports teams and Olympic athletes. Starrett thinks inserts and special expensive shoes are highly over-prescribed and recommended (it’s a billion dollar industry) and thinks most issues can be solved with the right foot/leg mobility exercises, paying more attention to your posture and even the way you stand, and (of course) less sitting. No days off – these are things you need to do every day! The book is full of step by step pictures of the lower extremity exercises you should be doing and I only recognized half of them (and I have went through a lot of these type of books). I know a lot of people who spend a lot of money on certain shoes because their doctor has told them they have to because of their issues and it would be very interesting to see if they followed all his advice if their plantar fasciitis, IT band issues, knee problems and shin splints would go away – he has a lot of testimonials from people he has helped. I personally know that I should work more on my posture. 2 other things he advises: if you are seeing a doctor for these problems who is not a runner or physically active themselves, switch. And stop wearing flip-flops-they are the devil’s footwear!