If you want to make a clean install of the new OS X Mavericks or even the older versions of Mac OS X, than I strongly suggest you to create a bootable OS X key or a drive.
As you probably noticed on a lot of websites these days, there is an engraved looking effect added to text, let me show you how to add that effect using CSS.
If you are a Skype user, it maybe disruptive for you that the program is shown in taskbar, although you don't need it at the moment. I will show you how to remove it from the taskbar.