Project and Action lists
Projects consist of things to do that involve more than one next action. Under GTD, each active project should have at least one next action to keep the project moving. You can have more than one next action related to a project on your next actions lists, particularly if the next action is not dependent upon another next action being done first. Some people use software or different tricks to link the next actions to their related projects. This may make it easier, but you really don't need anything fancy to make it work. During the weekly review, you can check to make sure that each active project has a next action on the next action "context" lists (i.e., you don't have to have a next action on every project every minute of the day, just make sure you update it as much as you need to to "get it off your mind"). For your Someday/Maybe projects that are not active, you don't need to list any next actions on your context lists, but if you have some ideas about what you may want to do in the future you can jot them down in the project support materials or the notes section of your project list, depending how you set up your system.