Well I use a few walkthroughs at once now, it's really annoying that I can't find a walkthrough that has every single detail of the game explained...there is always something left out that you can find back on another.
So if I play this game, then I have 3 windows open at once on my PC, so that I wouldn't miss a single thing and still it's possible to miss, I'm 1% behind again, so it's possible that I will have to do it in two times again to get 100%.