First of all I'm sorry I've not posted your book yet - it's been packed up and ready to go since Sunday night - I've just been caught up in various crap.
Secondly - I live for lists. As much as anything I use them as a "brain dump" tool. I feel even more overwhelmed if I'm carrying around all this Mental Load [tm] - at least if it's assigned to a list then I can consider the priority for it - and then, as FV45 says, it can be broken down further. 10 minutes towards the goal is still 10 minutes. :)
I write everything down. From the day I need to pay BT, to the day I need to think about arranging the MOT (if the dealer doesn't auto-remind me), which day of the school hols I need to check uniform for quantity of/fit/etc. It might sound over the top - but once it's written down I can totally forget about it - and even if I have a few shit days in a row I can refer back to my planner and know what needs to be "caught up" with, what can be safely ignored and what sailed past and nobody got hurt! 
I also use a digital calendar for repetitive tasks - e.g., my bloody meds I've been having to take twice a day and so important not to fuck them up. Without a digital reminder I'd have forgotten half the time or not eaten with them or something like that.
I have no idea about getting everything ready for a baby as my first was premature on my first day of ML so I had no fucking idea what was going on. This practice has continued to work for me for the last 9 years. 