There are many different ways to install Microsoft Office and other Windows programs in Linux but I enjoy the easy and simplicity of PlayONLinux.
To intall PlayOnLinux
sudo apt-get install playonlinux
The first time you run PlayOnLinux you'll be greeted with a wizard. Make sure you have an internet connection and hit next.
PlayOnLinux will update itself
Navigate to Install>Office>Microsoft Office 2010
A reminder will pop up, leave the default location and do not tick the checkbox 'Run the program' if asked. Click OK.
The Microsoft Office 2010 installation will begin
You can install office from a DVD or .exe file
Once you select your install media, PlayOnLinux will download and install the necessary software
And prepare Microsoft Office for installation on Linux
Enter your Product Key
Accept the Terms and Conditions
Click install now, to begin the process
Allow PlayOnLinux install Microsoft Office
Now Microsoft Office is installed and configured