Using laptop 24×7 without shutting down for Long Time.

I have HP laptop, this is my first laptop, and I have free WiFi availability. I have a question, that could I just put my laptop always ON for 24×7, without any problem, can you sugget me any preventive measure to save it from hardware loss. Frankly telling I haven's shut down it from past one month, it stays always on. Can it cause any problems? Please suggest.
