Detail shots were requested. There was more digital trickery involved in this illustration than I ultimately was comfortable with, which is why I kind of hate it now. But here's some (obvious) tips.

Records and CDs? Radial blur is your friend. Just eyeball in your highlights with a few straight strokes, then apply the blur.

Need to stretch a flat design to fit a plane in perspective? Skew Transform it.

Have metal or inorganic shapes you want to keep crisp? Give them their own layer, draw their shape in first in a flat colour, turn on Preserve Transparency, then paint away. Masks are also an option but they're more than you need if you don't require alpha transparency for parts of the layer, I say. That gramophone trumpet could have done with some bloom around the highlights though, it looks too cut out.

The rugs are totally cheap. One day I'll be sued for using oriental rug designs culled from Google.