For a one-day visit, I would strongly recommend the purchase of quick queue. Well worth it, IMHO, if you are trying to maximize what you can do in one single day, when you enjoy riding the rides.
With the purchase of QQ, I would hit the dolphin feeding (assuming that is something you want to do) at park opening, then plan the balance of your day around the shows. Between the shows, hit the rides with your QQ (which should mean little to no wait). Get the all-day dining so you can grab a meal or snack on the fly (Dine with Shamu is great, but it will take up quite a bit of your touring time on a one day visit).
One of the nicest things about SW, in my opinion, is that you don't have to have a super-detailed plan. If you put all the right things into place (all day dining, QQ, etc.) then go with the flow, you will probably get most things done if you keep moving. The shows are all awesome, so I would recommend you try to get in as many as you can.