Need help upgrading to an ssd

I will soon be getting a 120gb 840 evo to add to my current rig which has a segate 1tb harddrive in it. it kinda seems complicated to clone the os to the ssd and I really have no important files on my segate all I do on the computer is game for like 30 mins a day. So i rather just wipe the harddrive and install the os on my ssd then use it as a storage. how to i easily wipe the harddrive?

You will need to first install an OS on the SSD in order to wipe your current drive

Start>My Computer>right click on the drive you wish to wipe>Format