Do you know his love languages? That becomes important at Xmas time.
If you want to leave the door open for any possibility of reconciliation - even if you think you might be through - I recommend putting some thought into this. (But keep the receipt and make sure you can return it in case he shows up empty-handed!).
If gifts are his love language, you're best off (usually) buying exactly that thing that they told you about or circled in the catalogue (even though that takes the fun out of it for me). If he's a word of affirmation person, something that has a positive sentiment attached. Etc.