flank around the enemy lines using scouts high mobility and double jumping
use scouts mobility to dodge attacks from the enemy team
scouts main weapon is lethal at point blank range

find good position to snipe at and aim down sights using primary weapon and shoot at heads.
watch out for spies tho

pyro is a short range class so keep that in mind
use pyros airblast to reflect enemy projectiles using the the primary weapon
keep spychecking by holding down mouse 1 on everywhere to get the spies
w+m1

as the medic getting heals for yourself is the 1 priority above all
stay out of deadly attacks to heal your team
when that meter is filled up click mouse 2 to go invincible for 8 secs at the right time
when you have no one to help you defend, run away

shoot gun or punch
you have the highest health in the game so try tanking some damage for your team
get up close to have max damage
if you get any lunch box item, equip it over the shotgun

be smort
have the ability to multitask
build buildings to help your team
repair or upgrade buldings to make your buildings better

use stickies to trap the enemy team
have good aim
use stickies to jump high
you are bad at long range remember that
you are great against sentries

you have high mobility so rocket jump to the enemy team to kill them
you are a great all around class great for defense or offense

as a spy fooling the enemy team to think your one of them is a key thing to do
get behind them and back-stab them for a 1 hit kill
disquse and cloak to help you kill the enemy team
you are great against sentries using your electro sapper to render them useless along of the rest of engineers buildings
try not to act sus
beware of pyros