When you pause the game or at the opening menu there will be an option called "Tricktionary". This will show you every trick you can perform in the game. There will be a star next to any trick you have pulled off.
I would look at the Tricktionary and just go the the very first level in career mode and hit the trick then pause and look at the next trick I needed and restart the level to try the next trick. This sounds like a grind but can actually go very fast since you can restart the level just by hitting the triangle button.
The neat thing is that you don't have to actually LAND the trick for it to register. As long as your skater performs the trick, meaning the name of the trick shows up at the bottom as you perform it, then you get credit in the Tricktionary for performing it.
***Edit- Thanks to brehonia for verifying that you don't have to even attempt the grinds for the trophy, just the tricks.