The talk I went to with a podiatrist stressed not using any harsh implements or electrical hard skin removers. Normal care as to cutting nails (but not with industrial strength clippers). See a podiatrist for things like corns and verruccas.
A lot depends on whether you have any neuropathy which is why it is important to get that checked regularly.
I had a few scary moments when got a huge blood blister on my foot a fortnight before the L. marathon last year. I used compeed blister plaster on it and it was fine by race day.The leaflet that comes with it says that it shouldn't be used by people with D. I'd already checked with my doctor and she was happy for me to use it since I have full feeling in my feet.
2 good leaflets from DUK
http://www.diabetes.org.uk/Documents/Gu ... t.0212.pdf
http://www.diabetes.org.uk/Guide-to-dia ... Toes-test/
One thing it mentions which I think is very important is to look out for changes in shape of the foot. You may notice changes that a nurse might not. see.Charcot foot