To create sets of favorite images, click on an image in the gallery and then click "Add To Favorites" above the image.
Once the image is added, the text changes to "Remove From Favorites" so you can eliminate the image if you find one you like even better.
If you click on "My Selection" at top left corner, you will be taken to your saved images. You can save them in a new set - click on "Save" button in upper right corner.
Once you're happy with your selections, you may share them with me or with friends and family - just click on "Send to..." at top right corner. A box will pop-up - just fill it out and click "Share".