From bf/gf to fwb to just friends...any tips?

ok so my bf and i broke up about....id say maybe 2 1/2 months ago and weve had an on and off fwb relationship....were both tired of getting hurt from it so weve decided to be strictly friends...how can we transition from fwb to friends? we dated for 2 years so we are both emotionally and physically close to each other...idk what are some rules that we can establish so that we dont fall back into the whole fwb thing....