I've not read Tolle, but I try hard to do all I reasonably can today - and then let the rest go....that which I can't do, or can't affect today, I try not to worry about.
I was always weeks or months ahead of myself - that's not forward planning as I understand it now - for me, it was just useless worry and a manifestation of my underlying control issues.
I'm learning to let go and I'm happier and healthier for it
D