I'll start with one tip that I've already found to be quite useful. The phone comes with 4GB of storage which is shared up between the ROM, system DATA, app DATA so the actual amount of space left for apps is rather poor. Because of this you may find that several larger apps will just fail to install even after you've added a microSD card.
The phone is rather quirky with regards to storage - as I've found out. The best tip to sorting this out is to insert an 8GB or 16GB microSD card (the bigger the better) - and one that is at least Class 6 - into the phone then open Settings then Storage. Change Default storage location to the SD card and the phone will give you a warning. Accept this warning and wait for the system to set the microSD up for you. Once it has been set up you'll find that the microSD is now your default app storage so anything you install should be movable to the microSD rather than the internal storage.
Until I did this I was finding that it wasn't possible to move any apps to the microSD card. A bug or intentional behavior.. who knows.