Be careful when braking in traffic
If you are driving in a constantly moving traffic, keep in mind that most drivers are not suspecting you to brake rapidly. That is why everyone should keep a safe distance, but remember that sometimes it’s not the case and if you press the brake real hard, you may end up being hit by the car behind you.
Of course, you still need to brake if the situation on the road requires it for the sake of safety. But remember to use your brake wisely in any other case, like for example when allowing other drivers to turn into traffic.