I shared this quote once before, but it's a good one.
I see it as - you can't prevent life's little annoyances from happening, but you can stop yourself from replaying any incident over and over in your head, having a massive post-mortem about what you should have done differently.
I've just been at home today, trying to sort myself out as much as I can, and the flat needs a really good declutter, though I've been busy with Stag Walkers' admin, so I think it's time for a break.