GTD is a system for organizing your personal tasks, projects, ideas, and reference material that optimizes for organizedness, productivity, and confidence that what you're working on right now is the most important thing to be working on. I've used it for the past 2 years and find it critically important to me feeling good about my work and planning. There's a big learning curve but the GTD book will guide you through the overall mindset, explain the steps, and help you get started without overwhelming you. If you find GTD too complicated, also check out Systemist, a similar but simpler framework.
planning & productivity