Hey Bode,
I just checked out your OP thread for the first time. Nice progress since last year. You'd really been killing it before May. I especially like that you didn't censor out the embarrassing things like buying into the Sunday Mil. I think you are better for being honest with yourself and holding yourself accountable.
As far as poker goes, IMO you hit it right on the head in an ealier post. I have been in your position before. You need to go back to playing a little tighter and keeping yourself out of marginal situations. When you were grinding it up, you probably played better at a tigher VPIP/PFR. It is so much easier not to make those marginal decisions.
You may need to really and I mean REALLY re-dedicate yourself to being disciplined. When I cashed out most of my roll, I couldn't regain the discipline I had at 100NL while playing 25NL. My ego was just too big, and I thought I could outplay the guys at 25NL. I found out real quick that 25NL and 100NL are pretty similar and in a lot of situations you NEED the cards. Of course getting paid when you have the cards is where the real money is made. Your aggression level should get you paid plenty.
Finally, maybe your bout of recklessness/tiltiness stems from playing at a stake where losing 5 buy-ins has more meaning in everyday life and you can't shake it off as easy. If that is the case, I would combat that by playing more 50NL and building a bigger roll. Afterall you blew through there pretty quick. I would also only move up levels after earning enough in actual poker winnings to justify the move. I would use bonuses and rakeback as padding and live poker bankroll etc. I am not suggesting you blow it, but don't use it as a gauge of when your bankroll is big enough to move up. Another tip is playing 50 GBP games if you can find them. Stakes look the same. I used to do that at Crypto as a warmup for the next stake.
I don't know much about you, but if you're like the rest of us. You might need to define your goals for the next year. You have made enough to get to 100NL where you first encounter numbers of decent players. Are you trying to make money or become a better poker player? The two aren't necessarily mutually exclusive, but they are very hard to accomplish at the same time. If you want to make money keep multi-tabling as much as possible(no shame in that either). If you are trying to expand your game, you might consider dropping down to 2-3 tables and putting more effort into hand reading, betting tells, etc. It takes a ton of discipline because you don't have as many AK's rolling by every hour and you get antsy to play crap or overplay your reads, but it will improve your overall game.
Those are just a few suggestion for your game from my trip to 100NL last year. Hope some of it helps.
Run well friend,