What is the most logical next event?

How to keep your laptop battery going for as long as possible
Unplug the battery after each use.
Use the hard drive more than the cd/dvd drive.
As power consuming as hard drives are, cd and dvd drives use more power than hard drives.

Choices: (a). Keep a cd on if you smoke, play games, or have gaps in the battery shell. For instance, if you're reading a book, the best thing to do is to delete or remove the book and create a new one.. (b). That's all that can get you going and if you very need to, just leave it behind. When letting your laptop run energy saving.. (c). Even having one in the drive can be power consuming. They spin, taking power, even when they are not actively being used.. (d). Identify any issues that will affect battery usage. Check the temperature of your device during use to see if it is hot enough to safely run some programs..
(c).