You should look at last years records about planting and fertilizing. Reorder the things that worked well.
Why not plant some hedges in your garden to provide your local wildlife with some shelter?
Why not plant some bare rooted trees this month? November is a great month to do that.
If you want spring cabbages in your garden, you should be planting them just about now.
Go out and plant some spring bulbs! Your garden will look amazing as soon as they flower!