Every window and every door is a reminder. Or at least it should be throughout your day.
It should remind you that whatever happened on the other side of that door is over. It is gone. It is now in the past, and that there is nothing you can do to get it back. It should be a reminder to Let It Go, and to Let It Be.
It should also be a reminder that even though it is in the past, that does not mean you are powerless to do something about it.
Yes, the moment you pass through a door is the moment you move forward toward the next opportunity in front of you. It is also an opportunity for you to look back, and to ask yourself, “is whatever it is that happened just now worth revisiting, worth carrying with me as new baggage, or should I just Let It Go?”
If someone shot down your new idea in a meeting, is it really worth going after them? Or should you just Let It Go and get on with your day? If someone cut you off on your commute, is that space you have opened up for them, really worth it? If not, and I doubt it ever is, then Let It Go and do not dwell on it.
If, however, that event keeps happening, that person keeps berating you, or the affections you have for someone continue to be unreturned, then you have to ask yourself, is it worth pursuing knowing that they will not change. Or, should you yourself be the one to change and just Let It Be.
Let them go about their lives without you, or with only a limited part of you? Because that is the other half of letting it go. Knowing when enough is enough, and knowing when to walk away.
Tell your ego to be quiet, let the anger subside, and get on with your day. As fun as it may be to think up awful ways to get back at someone, all you are doing is giving them a home within your heart. You are giving them fertile ground in which to drop a seed. And that seed, with enough attention, will grow into a weed with the potential to suck the life out of you.
So stop it before it starts. Smile to yourself and breathe. Feel that smile radiate across your face and follow your breath down into your heart. Let the glow within your heart spread across your body as you push out whatever anger or ego was trying to arise, as you Let It Go and/or Let It Be.
Then get on with your day as you walk through the next door that awaits.
I hope this helps you.