You know where to put all your important files, but it should be very easy to move to your new computer. You should browse through all your folders to make sure that you do not miss anything and forget about anything else.
If you are certain that you do not miss anything, you can search your computer for the files you usually save. For example, you can find a file for * .docx that ends with .docx which is the file extension for Word documents.
Once you know all your files where you can transfer them to their new computer, you can determine the best way to back them up. You can do something to burn them into a CD or DVD, copy them to a flash drive or external hard drive, or even copy your network even if your old and new computers are on the network. You will have to decide on the first where you want to keep them on their new computer before copying it to them.
As a program you will probably need to reinstall them from the installation media. Most Windows programs can not be copied from one computer to another without having to re-install. Although there are some exceptions. This is a good idea to make sure that your new computer has your original installation CDs for any software. This is a good idea to make sure that your software version works with your new computer version of Windows.
The other thing you copy is your favorite / bookmark from your web browser. Internet Explorer is built on import / export features such as other browsers that allow you to save your favorite files and then import them to your new computer. There may be some files on your desktop that you want to copy to your new computer.
You should remember that in order to work with your new version of Windows you need to get drivers for printer items etc. so that you want them to get pre-installed and the device is supported.