first off and most importantly is get your heating on,no chippy worth his salt would hang a door or put down a wooden floor til the heating is on for a few weeks first,then i would get the tiling done,then wooden floors(make sure too cover them straight away,old carpet is ideal)then get your doors hung next,then skirting and architraves.,one more thing.get the floor tiled before you install stairs,if you need a good stairs man i can highly recomend a guy,and very resonable prices,he has just finished fitting 2 stairs in my house this week.