At Zen Habits Massive GTD Resource List, I stumbled upon three great workflow charts that make my attempt at understanding what GTD looks like appear quite pitiful.
Whoever is behind them has done a wonderful job of making GTD visual. Start with Collection, Processing & Organizing, then check out Daily Review and Actions and Weekly Review and Actions. Amazingly helpful.
Another one from foldedspace.org:
Scott Moehring created another excellent GTD advanced workflow chart (initially discovered at DIYPlanner) The tips at the bottom are especially neat, don’t miss them.
Concepts of GTD from Brevedy