I used to have this little plastic-ish strip that screwed into my swimstep that you could wedge an edge of the board under. I liked it because it was super clean, no sticky adhesive to add to the gelcoat and no stickers with borders that give you trouble when you wax around them.
It seems like most people prefer to stick some gator grip on there or the like, but I feel it makes the boat look tacky and not clean.
Speaking of that cool strip thing, does anyone know if they make that anymore? I sold my boat and my new boat doesn't have one....I think it was made by a company that makes binding bolts too?