Two things have made a difference so far. Identifying exactly what I am stressed about and doing my best to solve those problems and then let go until the following day. In part it helps to imagine that coming back rested IS the best thing I can do.
The second thing is dealing with a large number of small issues that have been over my head. In my life, these are things that I have "promised" but feel like I am failing on. I have just had to slog through and get clear of lots of them and weight seems to be lifting.
Also, a big change happened when I started waking up super early (ie: office by 7:00) and leaving in the early afternoon to do an hour of run/yoga/meditation. Perhaps it just works for me, but some of my stress was feeling like I was hurting my health.