Teenage me was a very angry lady, because my dad had taught me that anger always won. To some extent, that is true in terms of God's wrath against the unbeliever. God always wins because he is more powerful than us. Whether spending His wrath on His own Son or on unbelievers, He always wins.
Anger says: "This is wrong, this person who did this is a danger to whatever it is that I am protecting, and I need to win."
The next time anger comes around, I suggest checking each of those three parts. Has the person in question actually sinned against you? Does their sin actually endanger something important? (What are they endangering?) and finally, Do you actually need to win? Will winning really help?
If no to any of the three parts, your anger probably is baseless in current time. Your husband stealing a paperclip off your desk is not a battle that you need to win until you actually run out of paperclips - you don't need to win that. Your rude and disrespectful coworker is not really a danger to you, just a battle that you need to win by not losing your cool and calmly waiting for God's judgement to change their behavior. And finally, that bozo moderator on that online toy forum 10 years ago wasn't really wrong for banning you for having a nervous breakdown - that was your fault.
If all three of them check out, you still need to think about what your response should be and how best to win, which is different from the sin nature auto-suggestions that are frequently counterproductive. "Be angry but do not sin" (Ephesians 4:26). Often when I am angry, I withdraw from the situation and process what I am feeling and why before responding, which is kind of the first step in dealing with this. Withdrawal is especially useful with online encounters.
That's my best shot at general anger problems. If you have a relationship or group of people in your life that is continually provoking your anger, it may be worth writing down what is provoking your rage and taking a closer look at those relationships. It may be time to remove those people from your life, especially if they are a danger to you or causing real damage. Sometimes it's not you that has an anger problem, it's just they are not treating you well and you need new friends.