Music helps set a mood. You can search youtube for music by adding words like: relaxing, meditation, trance, chill.
You can also try to make a habit like after every game you stop to analyze that game, or after every game you solve 10 quick tactic puzzles.
I am finding it very difficult to stay calm and calculate in 5 minute games. I will play well for a short period of time but after 3 or 4 games I lose my composure and start dropping pieces everywhere. I think the main problem is my attitude. I get upset when I lose and get impatient for points, then I start thrashing and make ridiculous moves. I know the obvious answer is to take a break when I get like this, but I have trouble making myself do this like an addicted gambler. I need someone to drag me away from the computer screen by the ear kicking and screaming but unfortunately there is no one stopping me from just throwing my points away. I don't have this problem when I play slow because I am not stressed out and i'm calculating everything clearly hence the rating difference. I know this whole post sounds immature but this has been an ongoing problem and I need it to end now! Any advice general or specific would be appreciated.