Mother nature has speeded up our planning calendar by weeks, so some of us are scrambling. The basic requirements have not changed. You should have your mouseguards on, the hive should be wrapped (if you plan to do so), insulation on top the inner cover (upper entrance facing down), and a thin shim under the rear of the inner cover to allow moisture to escape. If you leave a super on, did you remember to remove the queen excluder?
It is too cold to do varroa counts, but a good time to do a fall treatment due to the lack of capped brood for the varmints to hide in. Some leave a super of honey, others use candy boards or other methods for winter and emergency feeding. There are excellent resources online for candy boards and other methods.
Tips - When you wrap, cut holes for the upper entrances. When you put your mouseguard on, remove the entrance reducer. You want more than just one or two holes for ventilation. Plastic insert - Depends on who you ask. Most close the insert or leave it open just a small amount for ventilation. A few leave it out all year. Some who leave it open wrap the hive stand if above ground to prevent freezing cold winds from blowing up through the bottom of the hive.