Another lastpass user here. I used to use an in memory algorithm like dpayonk mentioned.

But having a family and lots of other obligations, others in the household had to have an easy way of logging into sites (ie. financial).

Lastpass makes it easy. Just the one password for them. And I use the notes feature quite a bit due the mentioned reason above.

Two-factor on any site that allows it makes it a little tricky but that's all explained in my lastpass notes.