Obviously, the soft products are being taken care of from Starwood. It's harder to change that within the hotel, so I wouldn't take on that challenge.
Aside from the soft products, if you have been reading the "Dear Sheraton, Would You Please Retrain your Front Desk Staff" thread, then you'd know that front desk staff and customer service are extremely important. If you greet guests with a warm smile and take good care of them, they will come back.
I like attention to details. If a staff remembers my preference, or house keeping staff does a really good job, I tip them really well. I think that raises employee morale ultimately sending repeated customers back to the hotel. Staff training, IMHO, in this case, is the #1 priority.