Well one idea is maybe not cooking breakfast, lunch and dinner....in my opinion you don't exactly need three full on meals a day. When I was still a kid I think even as young as 9 or 10 I was making my own breakfast usually just cinnamon toast, a bagel, or cereal and on rare occasions my mom may have made muffins....my dad always had to go to work early.

Of course lunch was at school, got hot lunches but had to make my own cold lunch if that is what I wanted....so maybe your kids could start sharing some of the responsibility depending on how old they are. Aside from that is eating out more often, or buying quick/easy to prepare meals an option?