Start your seeds!
For warm weather crops like watermelons and winter squash, there is still time to get a harvest. If you start peppers, tomatoes, eggplant, this is the time of year when they germinate quickly and take off. If you keep them in pots, you can move them to a
greenhouse or other protected location and maybe keep them going well into the winter.
For cold weather crops, like brassicas, they also germinate quickly in the hot weather and as it cools off into the fall they can put on some impressive growth before they go into stasis some time in December or January. Things like chicory and onions don't slow down that much during the winter, and you can keep cutting them for salads or the soup pot.
I think fall is a better time for
gardening than spring in the Deep South. All too often in spring, you can get hit by a late frost and have to resow, only to watch winter turn into summer with no spring in between and your little seedlings burn up. But by planting in August, you get the speedy germination of warm soil, and the first frost is at least 3 months off. Go through all those
seed packs that you stuffed into a shoe box in the closet and get them started. Comes November you can decide which ones look good enough to try and overwinter.