You sow and sow.
There are lots of crops we can be sowing in August.
Of course, there are always salad leaves for pick-and-come-again autumn crops.
I tend to use "All Year Round" lettuce and keep sowing into September.
You can sow beets and radishes too, and I always sow plenty of turnips, which are so comforting in autumnal roasts.
You can sow carrots now and get a crop in six weeks. I sow in containers, far too many of them, and let them grow out.
By Christmas we have tons of baby carrots - the only thing I do is thin them if they look crowded, giving room to grow.
Pak Choi is a good late entry - sow now and collect in October, usually right up to first frosts. Plant out cauliflowers and cabbages now too.