|"Darling, I need a camera to take pictures of my camera..."|
Little holiday tip: when you're on the plane, sync the clock on your camera with your phone - invariably, your phone will be most accurate, as your network sets this for you.
Why is this useful? For me, it's useful for chronologically displaying photos from the holiday, so that if you're shooting with a DSLR, smartphone and point-and-shoot (as is the case when we go away), you can chuck them all into the same folder and your photo editing software will show them in the right order.
Then when you export them or upload them to a site (I use the Lightroom templates), they'll all be in the right order.
It's also a handy tip for wedding or event photographers if you have more than one camera or shooter. I recently shot a wedding party with another tog and needed to shift all of our photos back an hour because our cameras were both still on British Summer Time. They're just being hopeful...