Learn
The key to being successfull is to take your time and not get frustrated as you get to grips on learning how to perform the perfect dive for each of the different diving environments.
Change Dives
It's always worth looking through the dives you have unlocked to see what one will work best for the dive you intend to pull off as some dives will work better than others from certain platforms.
Make sure you take advantage of the advertisement videos to get free Coins so you can bank them to get more tricks.
Flips
The more flips you put in a dive the more Coins you will earn if your entry into the water is correct. Remember belly flops and back flops are both instant fails.
Walls
As the game becomes more difficuly you will need to be aware of where the walls are underneath you when aiming for the landing spot as hitting one of them is an instant fail.
Landing Zone
Check the angles when the landing zone starts moving and changing size and make sure you are pointing in the right direction before you attempt your jump.
Crates
Resist the temptation of trying to land on the crates as you will hit them naturally anyway, just focus your attention on landing correctly in the right area.
Change Things
Make the game more enjoyable for yourself by unlocking different divers and locations rather than just repeating the same thing over and over again.