Recommended Treatments for Regular Occurring Basal Cell Skin Cancer?

I have green eyes, light skin and grew up in CA in the 40's and 50's. I have been getting skin cancers for over 15 years now. I have heard of a cream that is being used on some skin cancers. I have also heard that some doctors recommend removing the top layer of skin with laser for a person with regular skin cancers.

Under what conditions are each of the treatments used? My face, arms, chest, back, and legs are all affected. What do you recommend for regular occurring basal cell skin cancer and several squamous cell cancers?