Play for fun. If your angry and frustrated you will lose your cool and fail in aim, jump, logical choices.
Spectate others.
Support your team in team modes more. Often times it isn't your single awesomeness, but your teamies that have your back that win the round. ( I'm guilty of not doing this enough :P )
Don't blame or put down your team, this is denial of the quakelive culture, where quiters, joiners, trollers, haters, campers, and people who don't want to shuffle all love to see the world burn and take it out here, and it isn't much different in other games. Imbalance happens, but if you are playing for win, and not for challenge, your gonna rage.
Join higher tier games when they don't mind.
Join the losing team when someone quits and they are one man down. You rarely gain much on the winning team in terms of challenge, and if your constantly challenging yourself on a losing team, STILL TRYING and not pissin about, you will get on the level of those who are better than you quicker. If you don't believe your a winner, your already a loser by default.
Don't ever expect to get better than your mentors. It might happen, but they have been here longer, and every bit of experience you gain, they are still gaining skill too. They need your skill to improve theirs, don't dismiss the value you bring to the game. They won't admit this to you.
Major plethora of videos on youtube to highlight any of your movement needs.
Shorten your strafe jump timing to the point your missing jumps from pressing it too early. You lose speed spacing the jumps too far. Don't over emphasize the first strafe angle, and following angles in general. I over angled for the longest time.
Practice maps are for practice, not gameplay skill. Practicing strafing in game w/ maps that are not straight paths and enemies that kill you is a whole different scenario.
Try to achieve 125fps if you can, I have to lower graphics settings to do this on a machine that can run ps3 games just fine..., and if you can't get 125, see if you have a video syncing feature to make smooth drawing to the screen.
Turn off background applications that use the internet and/or have high CPU activity prior to gameplay. Clear browser cookies.
Wear stereo headphones, turn on doppler sounds if off.
Install windows on a usb stick. Google "Windows usb install" and boot from that instead of the partition mess if dual boot partitioning is your issue.
I'm surprised to hear about mac complaints, and sometimes I wonder if mac users expect everything on a silver platter. I have no trouble w/ linux plugin on gentoo, and mac/linux are both based on unix/bsd, and many of their problems and solutions are similar in nature. I did have to find some extra answers on my own though.
Do you mac users who experience crashes every check your /var/log for error messages? I had to solve a couple issues w/ OpenGL and some shared libraries, but nothing quakelive is responsible for.
I agree 110%, just camp and feed your frag desire. Hide around corners and wait w/ gaunt. Spam taunts at ragers. Do what makes you happy, I bet most people aren't paying attention to anyone but the top players anyhow. If your not smiling y r you playing? Anyone putting you down for being worse than them is shallow, not worth listening to, and prolly trying to dismiss their own insecurity of skill. I'm notorious for screwing around and not being serious. I have more fun when losing.
Nice perspective Lorfa. I think this has a few points that can be applied to railgun as well.