Well, whenever I start to do things that are not really useful for me, I remind to myself that even though there are SOME biological imperatives, brains are mostly about PROGRAMMING, so that nasty habit you don´t like its like a program too. As a human, you can safely ignore your mental programming or even change it, the trick is to be consciously and unconsciously congruent(meaning your heart, mind and unconscious must agree to it). And while our "CPU" is tied to our bodies, out consciousness is pretty much free to roam, and that can be used to our advantage. For example: whenever you start getting too much inside your head and your feelings start to bother you, and you don´t want that, you can imagine yourself literally flying out of your body and looking the situation from a higher, more calm perspective. You can also choose to remind yourself that possibilities are not certainties and most of the time, the best approach to take with problems are to deal with them, but ONLY WHEN they become certainties, like a good ninja only dodges the knife when it has been thrown by the enemy. Aggobiating yourself with endless possibilities is a sure way to melt your brain and overload your heart :P
Try it sometime and remember, brains are just like computers in some ways, if you change their unconscious programming, the output(feelings and perceptions) change too!

Nice meeting you too btw!