Polaroid Pictures This wall art idea is by far the easiest we’ve seen. It looks effortless (because it is!), but it’s also pulled-together. Simply tape or tack personal photos or postcards of roughly the same size to a blank wall and wrap around a corner.
Evaporate trapped moisture (the cause of the stain) by directing heat at it. Start with the blow dryer on the low setting, so as not to burn the wood; if that doesn't work, turn the heat up. Get the tutorial at Homemade Mamas.