Bring in tender plants as the night time temperatures drop, you want the plants to start shutting down so they need to be exposed to cooler temperatures but bring them under cover before the weather gets too severe.
Lift or winter protect your Dahlias.
Keep leaves cleared from formal lawns and pathways, if you can, shred the leaves before you compost them to accelerate the breakdown of the material
Clean your greenhouse with soapy water or a pressure washer to remove pests and disease and maximise the amount of light to your plants
November is the best time to plant your tulips, you can pick up lots of bargains in the garden centres too!