Edit: I just looked at my post and it really looks like spam. It isn't. I am not employed, nor am I paid in any way, by Step Stretch, or Footsmart.com, nor are any members of my immediate family. I have used this successfully for both plantar fasciitis, and Achilles tendonitis. I would highly recommend it as both a therapy, and as a preventative measure, this being said by someone who is not a doctor, nor does he play one on television.
This will help. About $30.00. Will fit in a large equipment bag. Relieves pain associated with plantar fasciitis, Achilles tendonitis, ankle strain, arch pain and other chronic conditions. A double one is also available for two feet.
Step Stretch : Stretching Aids : Heel & Achilles Pain : Footsmart.com