It has been discussed about purchasing extra memory for vacation shots so you don't run out of memory before you run out of vacation but this might be something to consider. I have two one gig cards for my camera but could not find one recently before going on vacation. So instead of purchasing more memory I just dropped by the local Wal-Mart when my card started getting full and for $3.00 dropped all my pictures on a CD in the photo department. Ten minutes later I had a clear card for picture taking and had all my previously taken pictures safely on a disk.
This not only gave me more memory it removed the pictures out of the camera where the could be accidentally erased or lost. Also if you have a portable DVD player or laptop you can view your pictures and see what you have just in case some need to be retaken.
This has probably already been discussed but I did a search and didn't find anything except about purchasing new memory cards. I do realize that everyone that reads these forums may not have Wal-Mart stores where they are but for the ones that do it sure is a nice option, Jeff