Living in the moment sounds simple but it is actually hard because we re always stuck between replaying the past and stressing about the future.
Mentally - but we are still living in the present always. It is the easiest thing to do. The problem is we tend to let our thoughts and feelings about our past and fears for the future dictate what we do right now - or freeze us so right now, we do nothing.
But at night specifically, it all catches up, the past (mistakes, laziness) haunts me and I honestly don’t know what to do with it.
I can only speak for myself as someone who had a lot of this previously - but I have far less of the issue now I write enough. I get to clear my thoughts and process, plan and start acting toward - before putting my head on the pillow. Try it.