Containers should be lifted off the ground by using bricks, that way good drainage during wet weather is ensured.
Since the weather is cooling down now is the last chance to treat container plants for vine weevil grubs.
It is mandatory to check the soil of container grown plants often, some might even need to be watered twice a day.
Make sure that container plants under eaves or tall evergreens get enough water.
Liquid feed container plants and water them in dry spells! About gardening with old containers: http://j.mp/Mfo1jh
Water your container plants regularly! Even garden plants may need watering in dry spells: http://j.mp/MxmXVA
Do you plan to grow vegetables in containers next year? Some ideas for planting vegetables in containers: http://bit.ly/sapRmY