To be able to follow I started using a sticky note and sticking it just below the row I am working on. I also wrote the explanation for one of the symbols since the glossary is at the front of the book and I wasn't in the mood to look back every time.
You can see on the picture I also write down the row I have just knitted. That's because a certain cat loves to plop down on my book, moving the sticky note from its row placement. Lola, you know who I'm talking about.
I usually prefer to work with chart patterns when I have the choice. Do you prefer working with written instructions or charts? Do you have a different way of keeping track of your rows?