Digital Hygiene

Good power conditioning. 

yes, I forgot to add that everything "near the stereo", that is used by the stereo, except my mono amps, is plugged into a Shunyata power conditioner and I am using audiophile duplex outlets.

If we’re discussing Sonic optimization of digital audio chain, then other options are audiophile switch, audiophile Ethernet cable (Reiki, Network Acoustics), audiophile routers, audiophile footers (not necessarily for isolation but for better performance like CenterStage).  Better grounding options (CAD, Entreg, SR) may also yield sonic benefits.

I don’t believe that digital moats are universally a benefit as there have been several reports of it removing the “life” from the music.

Yes, it's also always good to practice good aural hygiene...

Oh my, that‘ll be a long list: good linear power supply and grounding on the on the router; good cables, a reclocked switch witha good power supply, possibly fiber conversion but definitely other forms of galvanic isolation to the server, reclocking the USB connection and galvanic isolation to the dac, superb clock on the dac as well clean power supply, possibly complete shielding of all eqiopment against RFI/EMI; proper grounding for switch, server and Dac. I could go on with proper isolation against vibration for all components and power cables, as well as RCA or XLR analogue cables but that‘s probably still incomplete. Unfortunately in digital everything matters albeit differentially depending on set up.