I made an small 10-paged errata booklet, every page stands for an chapter, with all the information sorted on the page numbers of the book..
I've cut up very small yellow post it's and pasted them next to the headline of errata'd piece.
So if i go around my book, see an rule i need, and it has an yellow dot next to it, i should check the booklet for extra ruling..
And since i made the booklet on the pc, i can just adjust it when new things come out and print an new one..
Also made one for each of my players..