Not everything can wait. Some things go into a jar now or not at all.
Strawberries are already at their peak and starting to thin out: a jam made today lasts 12 months and tastes immeasurably better than anything you will find on a supermarket shelf in January. Peaches and apricots have an even shorter window: in syrup or as a preserve, they keep beautifully and deliver a summer flavour that feels almost impossible come November.
Cucumbers and seasonal green beans make crisp pickles that last months in the fridge or, when properly processed, on the shelf. Cherry tomatoes, picked now at peak sweetness, become the base of every pasta sauce you make through winter.
Nothing complicated. Nothing time-consuming. Just the right moment, used well.