The following small steps should be taken to ensure smooth performance of your laptop and protect it from damages:
Ensure fresh intake of air for your laptop so that the extra heat flows out from it.
The screen is the most sensitive part of your laptop. Take proper care of it. Do not use rough clothes or cotton to clean it.
In the event of any strange sound coming from your laptop, go for a proper check. Check whether the sound is emanating from the HDD or any other component.
If the problem persists go for a complete checkup of your laptop from experienced and qualified technicians. It the machine is in warranty period, call up your service center.
Prevent your laptop from jerks as many movable components of it may get damaged as a result of this.
You can have a device monitoring software, which monitors the HDD, RAM and other components of your laptop.