Look at the things you'd hoped to achieve this year and congratulate yourself, you can still do them all.
It's not the end of the year yet and although you might feel like your time is up, you can still achieve what you set out to achieve. Look at what you had hoped to do by the end of the year and congratulate yourself on the things you accomplished. Do not be hard on yourself over things you did not manage, but also do not give up on them, you can still tick everything off that list.