Slightly off topic, but you seem to have a good degree of mindfulness and are aware of your thoughts.

It's something I have been trying to practice more often

For a more scientific prospective, read this:
https://www.amazon.co.uk/Chimp-Paradox-Management-Programme-Confidence/dp/009193558X

And if that's too dry, read this classic
https://www.amazon.co.uk/gp/aw/d/0141189576/ref=mp_s_a_1_1?ie=UTF8&qid=1523660963&sr=8-1&pi=AC_SX236_SY340_FMwebp_QL65&keywords=siddhartha&dpPl=1&dpID=51XIdEvEGqL&ref=plSrch

My positive affirmations

• it's all temporary
• everything is impossible, until it's possible
• try and see my self through the eyes of those who know and love me