Self Sabotage is a tough beast to handle...
If you want an entirely different perspective... read the intro to the Bhagavad Gita... the one translated by Eknath Easwaran
This is ancient Hindu text. But to give you a gist of what is says is...
The mind is like "software" (my words), it processes the inputs of our 5 senses and is meant to keep the emotions that the 5 senses raise in check.
If the emotion is a pleasing one... great... the mind keeps it open. If the emotion is a displeasing one, the mind acts what we think is based on instinct, but what really is just a relief of the negative emotion that was raised by one of our senses.
At every given point possible, the mind will keep all the senses in check and make sure they are all in their comfort zone.
So if you are holding on to nice profits at midday... you eyes see +10 pts on the ES, triggers the mind to keep it coming so you trade more. If you lose 3 pts on the next trade, the eyes see this and raise the emotions of anger or sadness even... you mind will not have that and so you react to it... trading more or WORSE taking a day off and comming back the next day with the same emotion trying to get even. etc.
This is just an insight, knowing that at any given point your mind is just trying to make you happy has been huge for me. Being able to step back and see how the emotions play out when a trade goes with or against me was how I plugged the self-sabotage leak in my boat!
hope this helps