Shelf like wall mount board holder, so that the board is standing up in 45 deg angle.
Should work for anything from regular skateboards up to big long boards.
Update: Added a second version with a little less material.
although bigger layer heights will print faster, I recommend 0.3 mm max, because the 45 degree ramp will not be so nice when using thicker layers. make sure to at least use 30%ish infill, because the boards are quite heavy, and the plastic might crack when using less infill.
Of course durability also depends on the plastic you're using. I found that PLA is just fine, but ABS would probably be more durable (never tried)
Unfortunately with those settings (30% infill), it takes quite long to print, on my printrbot plus about 5-6 hours.