There are always fun challenges going on at ClubCK, Color challenges, Sketch challenges, Card challenges, etc! and every now and then they post the 1 hr Challenge. These are my favorites.
The goal is to complete the challenge in less than 1 hr, which is fun for me. The most recent challenge was to follow this sketch.
I resized the sketch a little bit so that I could make it work for a one page layout instead of a two-pager. I printed my photos small so that it wouldn't feel too cluttered, and I think it worked. ;)
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