Wife and I have a monthly set, managed to the week budget spreadsheet in a shared document app. Enter all spend in the week its occurred and be transparent. All spend is put on our shared credit cards and we get 2% cash back on 100% of the spend. We usually keep under our budget and meet our savings and investment goals every month. Now and then we have an event, like car repair and we don't quite make the savings goal. Oh well, make it up next month! Works well for us.