Agree with much of the above. My list:
1 Specific roles for each parent (pick up, drop off, cooking dinner)
2 Independence of DC. My dd can / does dress herself each morning.
3 Make the mornings fun for DC, not "stressy". DC has a race with DH who can get dressed first, or we pretend she's not dressed when he goes in the shower and she goes back to bed fully dressed and says "surprise" to DH. This makes her get dressed on time!
4 decide breakfast the night before. A little obvious or maybe not, but DC will take forever and an age to decide what to eat for breakfast, then ages to eat it. We make that choice the night before and then whoever is on breakfast duty and sort it out as DC come downstairs. (Ps eggs are a great quick breakfast for all - we boil up several on Monday morning for the rest of the week)
5 Utilise IT as already mentioned: sync calendars, download decent scanner on iPhone (we have Scan Pro, much better than just taking a picture and saves as PDF not JPEG.
6 get a cleaner absolute life saver. Look after your cleaner - a million thanks yous on text goes such a long way as does random bottles of wine
7 solid wrap around childcare we've done nurseries and then switched to a childminder. Some friends have before/after school club, which they find very inflexible. Our CM is fantastic, she's flexible if we are stuck, and she keeps us up to date with stuff going on at school which aren't obvious on newsletters or the website eg non uniform days
8 utilise lunch breaks Dh is better at this than I am, but he'll do food shops, online food shops for click/collect, pick up stuff etc.
9 find another f/t parent we have 2-3 parents who we could call upon if needed, and we've helped out them too (the odd school disco run etc)
10 _no phones after work / before bedtime* a rule for the adults! It's easy to rush home and carry on working / checking emails etc. I've reduced this massively until after DC bedtime. It's there time to focus on, but equally I don't pressure on myself if DC don't actually want to talk / read / play with me.