Vibration - What are the Main Sources?

@jetter,

Pretty shamelessly, if I may say so! 

I will open the door to shameless promotion. I have limited vertical space in my rack, any suggestions for low profile feet/dampers that are actually effective?

@zlone,

It would be helpful to know what are the components in your system to suggest effective isolation / tuning. Your goal should be to seek out devices that do not offer a flavor or house sound. Isolation is all about less being more. Basically, products that have no effect on what should be in a musical presentation by eliminating more of the things that should not be. 

It would be helpful to know what are the components in your system to suggest effective isolation / tuning.

 Primary components are Schiit Gungnir, Schiit Freya +, Coda #8. Primarily looking at more isolation for the Schiit components for starters.

For isolation from EM fields Start with physical distance between components. Especially keep preamps and source devices well away from power amps and powerful amps from each other. Also from any nearby appliances with transformers as well if possible.
Low level phono amps are most sensitive. For example I placed my step up transformer in a mu metal foil tube to shield it from noise induced by nearby electrical devices.

Avoid running power wires parallel to each other and ICs if possible.
For physical isolation isolate speakers from floors if needed as in case of suspended plywood floors. If things in the room vibrate when you jump up and down speaker interaction with the floor is a likely issue.
Turntables are a whole other story when it comes to physical isolation.
If you address these things in most cases should be on very good shape. If gear rests on any solid foundation to start additional physical isolation will likely not add much if anything.