Be kind to yourself!!! I try to do the big cook ups on the weekend but also do easy stuff for dinner on the work days. So soup and rolls, eggs/beans on toast - and do plan ahead.
I stash all the toys away each night whilst the kids are in the bath - they are not sorted or cleaned up but out of sight!!! I also try to give myself a day off housework at the weekend - it inevitably gets trashed anyway!!!

xx