You can set up different wish lists and name them appropriately. For instance I have one called "buy me this" for stuff I like that Mr P can browse for my Christmas or Birthday.
When you want to set up a new one, click on the wee arrow at the side of the add to wishlist button. At the bottom of the menu that opens you will see an option to Create another wishlist.
You can then name it whatever suits and when you want to add anything, select the correct wishlist from the same drop down menu.
Clear as mud, eh?