blackbootz The key insight that I think kb refers to and that I got out of GTD is that it is essential to develop some kind of system first and foremost. Whatever site / app / book you use should fit that system best.
For example, my approach to email is that I make a Todoist to-do out of everything that asks me to do something. I archive all the other emails and only archive emails with actionable items once I did that task. Simple system + Gmail + Todoist = clean inbox. Might be a good idea to reflect on where your obligations come from and what systematic way you can tackle them - e.g., when you get a text with something to do, where does that thing go?