Enjoy your kids and do interesting things with them. Find things you love to do and do them. Read books. Exercise, get a trainer, walk, or go to the gym - if it's too hard with kids, get a treadmill.
Stop nagging and stop taking the bait. Hire what you need done. Find a good handyman and cleaning company. Have groceries delivered. If the grass gets long, don't say a word.
If you normally do things for him (laundry, making meals, etc.) slowly cut back until you're not doing them anymore.