Step 1: Rough Out Pieces
I'm using baltic birch plywood (3/4") but you could use anything you'd like. Start off by cutting two pieces to your desired size. Leave them slightly over-sized at this point. I'm going for 18" x 54"
Step 2: Make Strips
Cut one of the boards into lots of strips. This will determine how far apart your groves are going to be. I'm making mine about 6"
Step 3: Tilt Your Blade
Set your blade to determine how angled you want your hangers to be. I'm going for 15* off of 90. Once you set it, lock it down and leave it.
Step 4: Make Parallelograms
cut an end off of each strip so that you're left with a series of parallelograms.
Step 5: Don't Get Mixed Up
Pay attention to the orientation during the step above so that you DON'T end up with a trapezoid.
Step 6: Assemble
I'm using a nailer to make the glue up go faster, but you could use glue and clamps, or screw from behind. Either way, what you do is laminate your top strip to the big board, then use a couple spacers (3/4" - off cuts from the same sheet) and set your next board. Work your way down the entire piece until it is totally covered.
Step 7: Clean It Up
At this point it should be too long, so here I'm just cutting the excess flush for a cleaner look.
Step 8: Make Shelves
Now we can start making our shelves and pegs. For the shelves I'm leaving the blade titled the same, just raising it up. Cut the piece vertical along your fence...be safe. You can see I made a jig that rides on my fence so I can keep my hands really far from the blade.
Step 9: If the Last Step Was Confusing
This pictures illustrates what you'll end up with after you cut the back off of the shelf.
Step 10: Make Pegs
I also cut a bunch of pegs of varying size. Thinner ones for things like keys, and thicker ones for back packs, jackets, etc...
Step 11: Sand, Paint (if You Want,) Hang
You can mount it to the wall however you like. I used a french cleat. I also painted a couple boards to make it slightly more interesting. Good luck! Check out the video (in first pic) it might explain things a little better.