I've had to take breaks, but I'm still at it. Breathing is better knees are better but need to space out the runs more than every other day. some hip pain yesterday but I can see getting through week one in the near future. I found knee exercises on this website: http://www.nhs.uk/Livewell/c25k/Pages/knee-exercises.aspx
Turning off the brain that wants to quit is the main key for me. 1 foot in front of the other, listening to your body and enjoy the view works best.