I was intrigued by the wonderful convenience of a software, at usemotion.com , that takes all your priorities and deadlines and automatically creates a schedule for you. However, its price is beyond my own prioritities, especially since it's really aimed at business use, not that of a semi-retired person who needs to relax!
But I came up with my own -- this is extremely preliminary, just to get you started; I have yet to brainstorm and add fun things to do for years to come this new year time! It's just a chart in MS Word, with my wished-for relaxation times first, then absolutely-sometimes-requireds, then projects in order of priority including their steps. Please note that any specific deadlines would need to be added!