Utilising the right tools and system is a good starting point. Use heavy-duty trash bags to throw out the rubbish. Get empty boxes, such as cardboard boxes, to put recycling materials and papers in. You may also need heavy-duty storage boxes to keep things that do not belong where they currently are; as well as things that are too good to throw out.
Bring in buckets and mops to clean the floor. Use all-purpose cleaners or disinfectants, sponges, and cloths to wipe down all surfaces after you have cleared them. Then, get a broom or dustpan, vacuum cleaner, and extra bags for the dust you will encounter while cleaning after hoarding. You will want to vacuum after you have cleared a room.