Review my schematic?

I’m new to this, and I’m trying my hand at Eagle to create a custom PCB. Can I get some feedback on the schematic before I create a board file?
The board on the left is an mfrc522 RFID breakout board that I’ll connect with a breakaway header connecter. The center board is the spark core (2x header connectors). The board on the right is a VS1053 mp3 breakout board (2x header connectors).
There are two “satellite” boards that I’ll place elsewhere using the jumper headers at the bottom: one is a hall switch board and the other is the audio jack board.

Thanks for any feedback!!!