I don't have two kids but I often have more than one kid in my care, and many different nephews, nieces etc. I work 40 hr wks, go to school ft, etc. What works best for me is "special time" with each kid. Daily for my son I have 30 minutes that's all his. No cell phone, TV, hell or high water I'm all his. Since you have two kids this may be a little difficult. So as some of my friends do and I do this some times as well you can try "SPECIAL TIME". A movie just you and your daughter, or pool time alone, or some hobbies you guys can share. My son and I started going to museums a while back and his obnoxious only child syndrome has subsided greatly, I think in part to this "special mommy and son time". Hope that helped. :)