How do you keep track with the NTP learning?

[Wirginia]

I wanted to go back to where I was up to but can't remember where. I did a heck of a lot of reading over the weekend. I'd usually keep the page open but my pc does scanning during the night and sometimes during the day it's restarted so now I've lost track. I'd go to my history pages but lovely Firefox restarted with the pc today and emptied the history when it shut down/reopened, grrrrr!

Is there a way to keep track of which page I was up to, or should I, once I find it, book mark it and give it a name with that day's date??

TIA
Virginia

ps or should I print out the chapters and tick them off, just a thought...