Looking to hear from others who have a good meal planning/prepping routine - what do you do?

1) How often do you grocery shop?
2) How much do you prep at once?
3) Which meals do you plan/prep?
4) Whats working and whats not working?

Hoping to gather some ideas from others - I have a love/hate relationship with meal prep/planning. Realizing lately how important it is with two working parents, a 22 month old and TTC for #2.

Thanks!