Usually my guides go on for a while but I'll keep this short.

Whenever you and a teammate (or maybe even multiple teammates) are stepping on a teleporter while it's readying itself (especially non-level 3 ones take a long time) and you're trying to push eachother off, neither of you will know for sure who's gonna make it. There's a simple way to beat your teammates to it, though.

• Wait for the teleporter to be nearly ready.
  
• Try to stand in the middle, pushing your teammate away.
  
• Before your teammate can push you back, taunt. Any taunt but conga will do. Use the Schadenfreude if you want to be that guy.

If you did it right, the teleporter will reach 100% charge before your taunt is done and you'll teleport. You might lose a bit of time because you're still finishing up your taunt on the other end but it's worth it.

I don't recommend doing this just because you can, but when you actually feel like you deserve priority over your teammates. Never take priority over the engineer who built it, or over medics. If you're the engineer who built it or you're a medic, feel free to take priority. You may always take away priority from scouts, and dead weight players (4th spy, 5th sniper with like 2 points after 15 minutes).

Other guides by me: https://steamhost.cn/steamcommunity_com/id/stoutshakofor2ref/myworkshopfiles/?section=guides&appid=440