Because I travel so much I start to notice that as humans we're all the same, it doesn't matter where we come from and what our past. We are just all so similar, myself included.
I fall victim to this often but when things get hard it's so easy to complain and just get stuck in a rut. I've started to condition myself so that every time I want to complain, I just go and practice my craft. EVERY TIME. It's working a treat :)