As for Typhoon Lagoon, you must do Shark Reef first upon park opening. Stake out a spot on the way over. We did this and my boys were able to go through 3 times in a row and could have done more, plus they let you go through a little slower than later in the day when there's a line. The CM's there said within an hour or two the line gets to be about an hour or more long, then the boys went on to the slides. no lines there either if you go right away in AM after Shark Reef. Lastly, hit the pool. No waiting there!!!
In years when we didn't do Shark Reef, we usually hit the slides at Blizzard Beach first thing in the morning with no lines, cuz my boys think they slides there are better. Then we go over to Typhoon Lagoon for the wave pool, which they like better than BB.