If you own a laptop, then you need to be aware of the Hibernate and Sleep functions on your laptop. I have seen a lot of people who never get around to using these functions and actually shut down their laptops when they are done for the day… what a waste of time.
I reboot my laptops in only two cases: I have to reboot because of a software that I have installed (like Windows Updates); or I reboot because I have messed up the computer really bad by killing some processes or running the wrong software. Either way, I need to reboot around 2-3 times a month.
My default action when I close the lid of my laptop is to put it on Standby. This way, when I need to open it up again, it takes 3-5 seconds for me to get back in action. I put my laptop on Hibernate, only if I know that I am not going to be firing it up again in the next 5-6 hours. Restoring from Hibernate takes 30-40 seconds.
So basically, by not rebooting afresh (which takes about a couple of minutes), I save around 80-120 seconds every time I start working on my laptop (which is about 2-3 times a day). Multiple by 365 days, and you get around 24 hours of extra time over a year.