I see there has been no activity on this for 6 months but I will add my two cents anyway. You really should discuss this with your doc, each case is different. My cellulitis went septic (yeah the kind that can lead to death) so I have been very inspired to try to educate myself to prevent reoccurance, thankfully I do not have diabetes or an immune deficeiency which complicates things.
When I was in the hospital I started asking immediately about prevention but I did not get much response (they seemed to be preoccupied with keeping me alive) so I had to push. Eventually I got the most help from my dermatologist. I had swollen ankles so I now wear compression socks whenever I am awake, but you have to be very careful putting them on as you can cause an abrasion if you pinch yourself (keep your fingernails clipped close). This has reduced fluid build up in my lower leg dramatically which was a very good environment for infection. I also use a prescribed anti fungal cream daily between the toes(and for the rest of my life) to prevent athletes foot ( a common source of cellulitis infection). He also prescribed an ointment for a very occasional case of dyslaidrosis ecsema which if it shows up i get under control as quickly as possible. I use an prescribed antibiotic cream if I do get any kind of abrasion or scratch (I check for them daily). If I do have an sore which keeps me from wearing the socks I bandage the sore and then wrap my leg with horse wrap (available from your local farm store for a buck and a half).
After my bout with cellulitis my skin was thin fragile and discolored, so my dermatologist had me use amlactin cream daily (over the counter) to try to toughen it up, it seems to be slowly but progressively doing that. The amlactin will also remove dead skin and prevent dry cracked skin on both leg and feet which is also a source of infection.My hard dry feet are now as as smooth as a babies butt.
My infectious disease specialist has me on long term penicillin threapy (500 mg twice a day). There is some controversy over this approach, depends on who you talk to, but he seems to be comfortable with it.
To date this combination has been very sucessfull. Thankfully I also had a full recovery from the sepsis. Other than the compression socks and horse wrap and amlactin all these treatments are prescribed so as I said you need to work with your doc, I have three, a general practioner, dermatologist, and infectious disease specialist.
Hope this helps