That's mainly why I switched to GTD for all of my to-do lists and projects. Because my inbox holds literally every task or to-do item that pops into my head during the day, I never have that distracting "am I forgetting something?" feeling during the day. I can process and sort my inbox whenever I have free time, and the flexibility in deciding which tasks should be made into projects, next actions, etc... means that the system always fits my schedule no matter how unpredictable or crazy it is, instead of me having to fit my schedule into the system.