[vic_nyc]

Start a daily meditation practice. Just 15 minutes a day can work wonders - I speak from personal experience, having experienced some of those symptoms myself, and pretty much all of them gone. Here is a very effective one:

http://www.ishafoundation.org/Ishakriya/Learn-online

[atemerev]

Tried Headspace meditation app, worked quite well indeed. Then stopped it after 4 months of effort, can't get back on track. Same problem here. :)

[fennecfoxen]

Well, GO BACK TO IT then. Seriously, you're going to need to make a real material effort to fix your problems whatever you do, and if you're unwilling to bite the bullet and muster some self-control to work on things like exercising your self-control then there is nothing anyone can do for you.

I'd guess you don't have a novelty-addiction problem, you have a problem where you're unwilling to apply yourself to hard things with long-term payoffs, and the novelty-addiction is what fills in the gap. Maybe there's some reasons for that (procrastination of emotionally difficult things in favor of mood-repair is a big deal for a lot of people) but you'll just need to deal with them.