Experts in the field of productivity have long suggested that people need to get ideas out of their head and onto paper. Sometimes though, the things floating around are really not things you need to act upon right now. That's where the Long Term Planning comes in. Put your ideas onto a list by priority level and estimate the amount of time you think the project will take. Monthly, revisit the list and see if you can devote any time to tackling a project.
This can be used for home or classroom use.