My keys for staying organised are very scaled down Flylady techniques.
Do 5 minute 'room rescues' - that's a tidy up where you set a timer and do as much as you can in 5 mins. It's so encouraging. You can give bath, sink and loo a quick swipe and straighten towels in 5 mins.
You can hang coats, pair shoes, chuck junk mail and wipe down main surfaces in 5 mins.
Do your main living spaces once a day.
Do a morning laundry load - put it on first thing in the morning then either hang it out before work or when you get back from work
Lights, darks, towels, sheets, delicates - one a day on weekdays.
Fold and put away laundry while your bath is running, or just before bed.
At the weekend, do a one-hour (or 30 mins if your DC helps - 30 mins each = 1 hour) clean where you strip and change bedding.
Keep week night dinners simple with a mix of very easy recipes and healthy ready made ones e.g. filled pasta with fresh pesto and salad or eggs, sweet potato oven baked wedges and peas.
If you like cooking you could batch cook at the weekend. If you don't, just keep it simple and make sure you both get your 5 a day, fibre and lean protein.
If your teen needs help getting organised, have a 15 minute session of getting your work/school bags ready for the next day together and setting out work clothes/uniform/sports gear etc. It really helps them establish an organised routine, especially if they are forgetful or have ADHD.
Set aside one night or work lunch hour a week (Flylady suggests Wednesdays) to check admin e.g. paying bills, booking dental/eye/hair appointments, sending birthday cards etc.