(I'm assuming you have default controls.)

-Press F on live grenades to pick them up. Release F to throw. I recommend not trying to pick it up more than twice if you value your life. Picking up a nade also makes it do team damage, so even if you die you'll save some teammates.

-If you hold click to throw TNT, it does not cook. Drop it at your feet, pick it up with the above tip and it will cook. Giving someone 2 seconds to react to somewhat-wall-penetrating TNT = other man dead.

-Riflemen and Assault under the "backpack" slot can equip a radio. Radios increase capture rate + let officers call support if the radioman dies, so start bringing them if you have a surplus of supplies.

-Voice chat is local. When you're all alone, no one can hear you scream, so stop being alone.

-Stukas, Gun-Runs and Typhoon Rockets penetrate walls. Officers can call these things in on enemy capture points. Do the math. Or stop running into the big building to avoid the bunker-buster.

-Bolt action rifles can penetrate walls. I'm not 100% sure on the rules and consistency of it, but you can certainly ruin some days with this.

-Right Click with TNT sticks it to any flat walls you can find. Haven't confirmed if you can take it off the wall, but if you can't that'd be a nice piece of area denial for anyone wanting to get by it.

-Calling in ammo boxes as attacker is still useful. Doing a fully resupply at a crate gets you your explosives back + heals any damage you've taken. Letting engineers not blow their load and become a basic riflemen for 5 minutes is really nice.

-If you put a sling on your rifle, switching from and back to your rifle grenade allows you to reload the grenade slightly faster than just pressing the reload key. Oh yeah you get rifle grenades as a rifleman. They're helpful.

-Oh ya I forgot if you tap F on somebody and they got the same gun as you you can share a magazine thats kinda nice

hey check out this cool drawing I saw on a bathroom stall
8=============D~~~~~~~