Brian Earp and John Bargh think we should celebrate the decisions we have made even if free will doesn't exist:
It seems that people do not possess a consistent belief in free will so much as they strongly wish to take credit for the good things they are and do (regardless of whether they caused them), and to distance themselves from the bad things (even if they caused them). Evidently, the belief in free will is not principled, but socially strategic in nature. So what, then, if one’s will is not ‘free’ of internal causation?
It is still your will and my will and each is unique: a confluence of genetic heritage, early absorption of local cultural norms and values, and particular individual life experiences. After all, one can claim personal ownership of one’s will just as much as one claims ownership of one’s name, eye color, and birthday, and be as proud of one’s will and its products as one is proud of the exploits of great-great-Grandma the pioneer, even though one’s ‘free will’ played no role in any of these.
The Dish 