Shaco has good Dragon control in the early game. Make sure you keep it warded at all times so you can spot him before he takes it.
His duelling power is rather good in the early game. Think twice before fighting him especially if you’re spotted as he may place a Box W behind him and use try to chase him down.
As a laner, warding bushes directly outside of lane won’t prevent a gank, so you want to ward in places where he can Deceive Q over terrain of some kind.
If your team is grouped and you have no vision on Shaco, make sure you have a Sweeping Lens and vision surrounding you, so you will be alerted if Shaco tries to jump in and assassinate a carry.
Do not chase Shaco as he may be baiting you into running into his Boxes W or towards his team.
Shaco will try to assassinate squishy targets that are moving around the map alone. You can prevent this by playing as a team and by avoiding walking in unwarded areas if you don’t know where he has been.
Shaco can assassinate targets during the mid-game. Make sure you stay as a team so he is unable to take anyone down.
Once Shaco is level 6, his ability to solo the Dragon or Rift Herald increases thanks to his Ultimate R. Make sure you keep those objectives warded so you can spot him before he takes them.
Shaco’s damage output increases a lot when he completes his first item. At this stage, duelling him is not going to favour you unless you have an advantage.