Cooking Grenades
Frag grenades have a 5-second fuse. Cooking means holding the grenade after pulling the pin (hold LMB) and releasing after 3–4 seconds so it explodes on or near the enemy with no time to dodge. A perfectly cooked grenade is essentially undodgeable. But hold it too long and it explodes in your hand, instantly killing you.
Smoke Walls
A single smoke grenade covers about a 10m diameter area for 15 seconds. To create a safe rotation corridor, throw 2–3 smokes in a line with overlapping coverage. Always throw smokes where you are going, not where you currently are — the smoke needs to be blocking the enemy's line of sight to your path.