Holidays involving your ex-wife
1) Small things go a small ways. If your kids are high school age or younger, it’s a good bet that they haven’t gotten anything for their mom. As painful as it may be (and great if not), help them out and buy her a card and at least a small gift. This will pay back in spades.
2) Sign the card and add a nice note—again, may be painful but you’ll be glad you did.
3) If it’s Mother’s Day or her birthday, ensure she spends some time with her kids. It’s good for her and your kids.