• When escaping enemies while cloaked, move back to where wherever the person chasing you just shot as most people confirm you aren't in a spot after they shoot there.

• Cloaking gives a 20% damage resistance and reduces how long effects are applied on you.

• You don't need to look at the back of the model to backstab. You just need to be looking at the back of the hitbox.

• Players that just spawned have wallhacks which makes being disguised while cloaked near the enemy spawn a generally bad idea.
• Spy is the second fastest class allowing you to catch up to most classes.
• Dying after stabbing a key pick like a medic or a demo is nothing to get mad at.
• Creating a chat bind to inform your team that you've just sapped a sentry can help your team make pushes.

That's it. Always remember...

Most TF2 players are a tad ignorant and deaf.