As far as bluegills and crappie are concerned, just think small and slow. Chromatids are great for 'gills, as are midges and small grubs/worms. Crappie are a littler more active in winter than 'gils, so small clousers and streamers work fine. Just be prepared for very light hits.

Smallmouth bass stay active all winter in the south. Just size down a bit and search a little deeper water with structure. Same for largemouths.

Winter is primetime for White Bass and Striped Bass (freshwater). The cooler water holds more oxygen, making the shad more active, making the stripes more active. They will be roaming in large schools searching for groups of shad to decimate. This can be some of the best fishing of the year. Jump-Fishing is especially good in winter. Just look for flocks of wheeling diving birds. If you look under them, you will see the water boiling as the Stripers and Sand Bass viciously cut to ribbons large groups of bait fish. Just get within casting range, match the minnows as close as you can, cast into the melee, and hang on. When they go down, just wait a few minutes, and they will come back up nearby. If you lose contact, just look for another school. My favorite patterns for this are Puglisi-style shad patterns, Polar Minnows in shad colors, and larger Clousers. Best colors are grey/white, all white, all grey, and chartreuse.

Winter is the best time for trout here in the south as well. My best pattern on the Hiwassee, Jacks, Ocoee and Conasauga Rivers are red and white Clousers in small sizes.