Do download the disneyparks games app. Gives you access to all the in queue entertainment stuff like the virtual creature spotting in the (circa 3 hour long at peak times) avatar queue.
Do be there for gate drop if you want to get onto slinky dog or avatar without a crazy queue. They literally have a chain of staff holding hands walking in front of the crowd so that you can't run and nobody gets trampled. BUT you get to do those rides without the crazy queue.
Use the online queue times app regularly and be prepared to dash. If a ride goes down and is closed temporarily the queue will drop right down and you can beat the crowds by waiting until it reopens (generally very quickly)
Do plan the fuck out of it. If you want to cover all the popular rides/shows/meet and greets/jedi training etc then you need to plan plan plan plan plan.
We've been a lot of times now. I would never go without staying on site with a meal plan (we schedule trips around the free dining). This is particularly the case with little ones since you then get all of the character meals and don't have to queue for ages to meet cinderella etc.
Get your dining reservations and then plan your park days around it. The same goes with the shows like the fantasmic show at HS and the extra magic hours days.
Do take your own drinks in to the parks.
Do have a little (but very polite and friendly) moan if things go wrong since they will correct it and you might get a golden ticket (like an extra fast pass)
Do be aware that star wars world will NOT be open this October. They've confirmed "late fall" means Christmas or later 