Yes, there is a way. For everything you want to move (documents,music etc) you have to create folders on the new drive first (e.g. D:\Documents). Then in the left pane under [My PC]
1. click on "location" tab
2. input the new location
3. click on move
you will be asked if you want to move everything, then answer with yes
the files will be moved then but depending on how much you have it might take a while.
Analog you do this on the others...
This is how I have done it. Hope it helps
in addition, you might want to run the disk cleaner, especially to clean the system files. This may take a long time but usually free's a lot of space. do not forget that restore points take up space as well. I personally do not need them as I do an Image of the system drive every week (that is why my system drive is so small)