Well, I am trying to use up older things, and figure out my gaps.
I know food is not too bad, but toiletries is something I need to pay more attention to. So once shops re-open, that is something I will be working on.
And I am already working on planting more veg in the garden than normal (I grow tomatoes in a hanging basket and lettuce on window ledges normally, and a handful of peas and beans in a small bed). Some we will eat fresh as it's ready, but I will also "sun dry" (in the oven) batches of tomatoes to preserve in olive oil, roasted peppers in olive oil, and freeze peas and beans.
I also have a list of things to put into the storage unit we have (only a mile away but closed for over a month now) that we don't need, and things to get out (like jigsaws and my off-season clothes - I have 2 pairs of shorts at home right now, when it is heating up quite a lot some days...). I'm glad I had kept my Kelly kettle and camping sized charcoal bbq at home though, to cook a little differently and in the garden, for entertainment as much as needing alternatives a couple of days (I keep my 1 ring gas burner and the gas cannisters permanently here in case of problems with power in winter).
And if there is going to be the potential for another again in autumn/winter, I think more indoor entertainment options are definitely needed - like exercise ideas, and board games, books, and crafting materials for full projects (I keep finding I am missing a vital piece!!) - and finding SOME kind of hobby that DD will do herself.
And apart from actually cleaning out the shed to make space (get rid of 20 years of paint tins - at least 70% of which will never be used again!), getting enough DIY materials for DH to keep himself busy (and possibly a few bits of wood or other stuff for him to get crafty in a manly way).
I think I would like to organise some kind of overhead shelter for the garden also - a shade sail or an awning of some kind - partly to keep the sun out in summer, but also keep the garden as a usable space in winter. It doesn't need heat, we can wear enough layers, and waterproof jackets. But just keep the worst of any rain off, and maybe heat if we can find something that works - but so it's useable and not miserable as a space.