I use the Talisman to demagnetize every CD and LP prior to play. I don't do my cabling as it is infinitely well shielded and has special anti-magnetic properties (GroverHuffman.com for details).
2. Isolate everything from the floor. Even Schumann frequency generators and power supplies. I do not isolate my stands or speakers from the floor. My floor is 12" thick, 1/2" steel reinforced, 3000 psi concrete and quite dead. I don't think the expense of further isolation is warranted for those items.
3. Clean all wall outlets in ALL rooms of the house with isopropyl alcohol. Why? I never heard of this tweak.
4. Always store all CDs and LPs vertically. I always do, all 42,000 of them in custom shelving for 40,000 of them. Same with 7,000 CDs, stored in roll out steel cabinets vertically.