An idea development system is an efficient way to organize, develop, and apply information. You can start by making one notecard per day. In a month, you'll be developing a habit.
You'll see your productivity rise and your stress decrease — because you have a system for storing all of your important information. You won't need to rely solely on your memory or "top of mind" creativity — because you have a system.
No matter your field, expertise, or interest, building an idea development system will accelerate your growth, learning, memory, and creativity.