Slide into the fight, do not walk into it
The map is vertical. Climb, drop, re-peek. Keep additional game information nearby when a small map still has a ladder you forget.
TTK and the throw knife
A clean first shot beats a long spray. Knives punish reloads. Check related resources before you copy a loadout with no mobility.
Spawn, flip, repeat
Do not sit a headglitch for a whole streak. The next spawn is already behind you. Skim additional guides for extra notes on scorestreak timing.