I remember karena making a great comment on the other board, how when an animal is injured they take themselves off to a safe place, a cave perhaps, to recuperate/heal. Some stages in grief is a bit like that. Being social creatures we need to maintain connections (seeing family, talking, connecting with others etc) but we also need to slow down a bit, allow our injured minds/bodies time and space, just for a while.
The day may have felt unproductive but remember the things you are still achieving, even though they may seem small. Getting up, facing the day, walking the dog, preparing/eating food - these are all achievements. And I would hazard a guess that some of these little things have grown in volume slowly over time - the dog walk may have become slightly easier etc. All small steps to coping better, no matter how small the step forward, it's a step forward. Its easy for us to think we havent made any progress, but I think writing things helps us as it captures the moment and I know I've read threads where people have re-read their earlier posts and realise there has been a step forward, however small it may be
Just focus on noticing small progress, whenever the motivation or stamina does strike then do some more but don't berate yourself for not moving too quickly. All little steps

xx