Our condo is a finished loft space, which means for the most part there is only a thin piece of drywall covering solid concrete. With the use of a hammer drill, pretty much anything can be hung up with confidence.
First, he put these shelving units in our washroom:
(note: we love Kitchen Stuff Plus! The baskets and art are from there too)
Then, Cam hung our pot rack above the island (such a space saver!!):
Finally, he mounted a small wall shelf and mail/key station at our front door. We've been looking for a hall table, but they're all so big or so expensive. This inexpensive solution here solves our problem of somewhere to drop our keys, wallets and mail and takes up almost no space at all!
P.S. Note to self: Take better photos.