Re: cracked heels?
I have the same problem. I have got it under control though with two things. First of all get yourself a good "cracked heel" cream. There are several and they probably all work well. I use Dr. Schols or Miracle Heel Repair. I like both a lot. Also use a pumice stone during every shower. You will notice improvement almost immediately. You gotta keep up on it though.
Also you can use vaseline at night. Use an old pair of sock you don't care about and slather on the vaseline and then put the socks on and wear them to bed. This works pretty good but I don't like socks on at night so I rarely do this one.