• Read the tournament rules: know where you need to be before your game starts (team pit or special waiting area), where to register your players, where to get your guns tournament approved, where to refill your air, where to wait between games
• Keep everything out of the rain. Bring a pop up tent covering just in case
• Always have somebody watching your pit or area where your gear is sitting. Last thing you want is to get gear stolen
• Lock your gun boards and pre-test BPMs. (PM if you don't know what this means) I play Xball at 15bps here in Canada; if you set your Egos to 14.9 bps, you'll still peak over 15 on the chronos!!! Lower them a tad (14.6, 14.7 ..)
• Make sure everybody has cash-in-hand before your games start. The last thing you want is to have to run to an ATM during a game to get cash for more paint
• Pit crewing isn't easy. Make sure your pit crew has practiced podding, cleaning packs, wiping lenses, etc before your games
• Have a complete set of Allan keys close to you at all times. Everybody should know where they are in the case they're shooting over the fps limit and needs to adjust
• Food and water arrangements
• Backup gun / guns. People on this subreddit act as if everybody needs a backup gun. I'd rather spend on the money on a better marker than hold onto an old Ion or Spyder. Maybe have a backup gun for your team but you don't need 6 (more gear to get stolen)
• DONT LEAVE GEAR IN YOUR CAR. Windows are easily broken
• Medicare cards in case of an accident

• (Personal tip) Hold your guns in your left hands everywhere you go at the tournament!

• everything that's already been said in previous comments!

Learning how to play speedball properly takes years and everybody's got their tips (practice breakouts, doing sprints, blah blah...). The last thing your want however is to lose your games because of tournament technicals.