what kind of bike? If it's FI sta-bil is fine, but if it's carbed, turn the gas off, start the bike, and run it until it dies. That way you'll have a full fuel tank to prevent it from rusting, and empty carbs to prevent them from gumming up.

If you have elctricity in the storage unit, a battery tender is gonna be a good idea, if not disconnect it.

do an oil change right before you put it away. Contaminated (used) oil can and will eat away at internal parts.

and yeah, if you can, get the bike off the ground, front and rear.

it's also not a bad idea to coat any exposed metal parts that don't have any coating to protect them(chain, fork tubes, anything chrome or bare aluminum) with something along the lines of vaseline. Helps keep corrosion to a minimum. Most storage units aren't climate controlled, and any and all moisture can start corroding things.