I have:
M-Audio Delta Hardware Recording Interface
Tube MP project series mic preamp
Sure SM57
Amp modeling processor
2 no name speakers and a receiver
A computer & software

Am I missing any pieces to the puzzle?
Should I get a small soundboard?
Better quality studio monitors?
A condenser mic?
An equalizer?
A compressor?

I'm trying to record guitar, bass and vocals in my room. My question is, what should I improve on other than obvious skill and practice?