If you have a dual boot setup on your machine, be it Windows/Linux or Windows/Windows, one thing you might want to consider is having a common temporary storage location between the two. The article I linked to gives a pretty good overview of how to accomplish this referencing all the common items you want to look at.

Besides the obvious advantage of less hard drive space being used (which probably isn’t too significant) and less clutter on your systems to clean up, a great benefit is the ability of common programs installed on each OS being able to share the same settings. Since each OS really doesn’t care where the storage location of common documents is kept, you could point them at the same location and what is good for one will be good for the other (i.e. bookmarks).

Granted, this is minor, but if it is a pet peeve of yours you can address it. One thing to keep in mind, however, is registry settings on one OS will not be available in the other, so some settings may not be transferable.