It’s important to know what needs to be collected and how to collect it most effectively so you can process it appropriately.
To make the collection phase work: Every open loop must be in your collection system and out of your head, you must have as few collection buckets as you can get by with and you must empty them regularly.
The collection tools: physical in-basket, paper-based note-taking devices, electronic note-taking devices, voice-recording devices, e-mail.
