Don’t try to remove obstacles- they will never be gone.
Do it first- even before you get dressed if possible.
Before the housework is finished. Take a leaf out of Sarah Millican’s book and just put the staff to work (dishwasher washing machine dryer) then ignore the housework.
Put your phone on ’do not disturb’ – Joanna penn has hers on do not disturb (me too but now and feels okay, friends have learned not to call me).
Make yourself a cuppa and write 45 mins and take a break, then do it again and again and again until you are done 🙂