I've bought my first PS Vita !

I received it today, it's a PCH-1104(3G). Paid it 110€ with a bunch of accessories (8GB Vita card, travel case, protection case, FIFA 14, and a noname grip). I'm so impatient to mod it and play on it ! Sadly I've received my 512GB SD card, but I'm still waiting to receive the SD2VITA adapter...

Do you have any tips or must-have apps/plugins for a newbie like me?