The three main things for a farm inspection are
A few other things off the top of my head -
Have your medicine records up to date and medicines in a locked cupboard. Hide any out of date meds.
Sharps container for used needles (old milk bottle in my case) Which you ask the vets to dispose of for you.
Keep water tanks free of sh*t.
Make sure your stock box is in good state of repair ie. loading gates, ramps and floor.
Gates and doors around buildings and yards in good condition - no sharp or loose bits.
Health plan. We have a FW year planner with a few days marked for worming, 8in1, bvd, lepto, etc. etc. (keeps them happy)
Manure plan. Map of the farm with a few fields shaded where you normally spread muck.
Movement book up to date.
Have some cattle pasports to hand for them to check.
Receipts for bought in feed / protien and a couple of analysis sheets.
They asked me once for a list of my college qualifications. Got my old tutor to write them out officially and they've never asked for it since [:'(]
Sprays locked away.
Fert especially N hidden away from al quaeda.
Nice cup of coffee and cakes and biscuits.
Bucket of disinfectant for inspector to use on arrival and departure.
Just a few things that we've encountered during inspections. Mostly common sense and some ridiculous but achievable.
PS. If they suggest anything ridiculous that you should be doing, just say,"Damn, thats a good idea. Why didn't I think of that?"