If you want to do something, you make time for it.
People have a tendency to cram too many activities into too little time or leave things until the last minute.
Pace yourself. Putting things off only creates a future impediment...
Why not do it now and then forget about it?
If you don't have time to do something now, prioritise.
Do what you can immediately and do the rest later, or don't.
If you make relaxation one of your priorities, you will treat it seriously.
When relaxation becomes important enough to you, you'll make time for it.