Here is a compilation of useful articles, and websites I have found useful over the past year that helped me get on the road.
Most things to get started you can find here
Lessons Learned: What to Pack for the Altiplano
One Question, Five Voices: What’s in your tool kit?
Stuff I’ve Written
I specifically used these for packlists before undertaking my journey through South America. Though, I wouldn’t follow Martijns packlist, i really like his photos and storytelling.