1. Car cover not needed if stored in enclosed area
2. Best to put 3M on ASAP while paint underneath is unspoiled
3. Maintain your battery - best way is with Porsche battery maintainer. If it dies, you won't be able to open your hood to get at the battery without a little headache. Ask your dealer to throw one in when you pick it up.
4. Other storage tips are in the owner's manual - there's not much to it.
5. Start your car at least once a month while stored. This is controversial, but I believe it's good so that oil can circulate and lubricate bearings and such - prevent them from drying/oxidizing.
6. I would do the following: do not allow the dealer to detail the car; wash & clay the car when you get it; 3M; Rejex; then Carnuba
7. Follow break-in, then change oil right before storing. Whether you do this or not, I would make sure oil is full before storage. This will also be controversial, but it's what I did and would do again.
9. Full tank of gas. Gas stabilizer is recommended if stored > 4 months.
10. Roll the car every 3 weeks so the tires don't sit on the same spot. This plus >50 psi should prevent flat spots.