Finally I’m sure that never turn off my laptop for a long period (a week or fortnightly) that will be ok. I always wonder that my action to never shut down my laptop will causes the system error or any other bad thing. But, I just read some threads from the forum that never turn off mac is ok and won’t hurt your mac.

Since I’m working with data and information, it seem impossible to turn on and off my laptop regularly (daily), because I need it 24/7, and it is very inefficient once I turn off my lapton, then I should start from the beginning, eventhoug mac is very fast loading. The only thing I do is, just close the laptop lid then the sleep mode will turn on. That will save the energy and you won’t ‘lost’ your previous works.