For whatever reason, Apple hasn't allowed you to enable TRIM (one of the best ways to maximise the life of your solid state drive) on third-party SSD drives. Now, you finally can, no third-party app required.
Apple pushed out a minor update to OS X today that fixed some bugs and also adds the ability to enable TRIM. Once you update, all you need to do to enable TRIM is open up Terminal (Applications > Utilities) and type in this command:
sudo trimforce enable
You'll get some warnings, so make sure your SSD is capable of using TRIM before you run it. Otherwise, you can just go through and say yes to the options.