I believe tilt is one of the main reasons decent players are break even or losing.
Here's my little story:
Lost a whole lot of money myself playing the game doing everything wrong i could do, playing semi-depressed, doped up or drunk all the time, $1000s in debt (had my own business which went wrong due to burnout) trying to win big quick to get out of it, no br management, depositing more and playing higher the more i lost, frustrated, anxious, tilted... the worst downward spiral in my life, as a result i'm now living with my younger brother until i have payed back all my debts. (since december 08).
The first 6 months i didn't play any more at all, sick of the game, busto on all sites.
I started to feel better again, landed myself a great well paid/low stress job and started to feel the itch again, i said to myself; ok Tommy you can play again but you'll never deposit 1c again!
So that's what i did, started playing freerolls and satelites with the points i had left and applied the nittiest br management ever.
Now i have a decent microroll of $600 and i am working very hard on my game.
Had some ups and downs in the beginning of my comeback but the last couple of weeks it finally clicked and i'm really starting to get my tilt under control.
Things that help me to tilt less and play well more:
1. Tommy Angelo's series on DC was the catalyst, the breathing exercises really help you relax, also bought a book on mindfulness and am studying the techniques.
2. Focus; turn off everything but the game and play no longer than you can keep your focus, for me about 1h/session is ideal, i also set a target nr of hands and stop if i reach around that number, doesn't matter if i'm up or down.
3. Multitable; used to play only 3 tables max and played too many hands out of boredom, got tilted when i lost a hand.
Now i play 6-8 tables shrug and insta-rebuy when i get bad beat, no more time to worry about the beats, there's to much going on at the other tables.
Also if a certain player starts to get on my nerves i try to close that table and open another one, trying to stack someone out of hatred is -EV as are any other negative emotions.
4. Reading strategy on 2+2 ldo.
Thanks to applying those rules i'm now consistently winning for the first time ever and it feels great even if it's at the micro's, right now i'm on a 12 session / 16 buyin winning streak.