1. Power cables on one side, signal cables on the other.
2. If you are comfortable using a soldering iron, you can "trim to length" your "pre-made" RCA cables on one end and solder-on some new connectors from Calrad or any other brand you like.
("Trimming" your existing cables requires 1/2 the soldering of making a custom cable, is better for the environment since you're re-using instead of throwing-away, and if the left-over cable is long-enough, you've got another "half" of a custom patch-cable for use elsewhere.)
3. Do the same for your power-cables - but DO NOT solder them - you should use "legal" Screw-type replacement plugs available at your local electrical distributor or hardware store. (In the event of a short, the solder could melt before the circuit breaker pops, leaving a life/safety hazard. - sounds unlikely, but better safe than sorry.)
4. Make sure there is enough room between your heat-producing equipment (like Motorola cable/FiOs boxes) for proper airflow - especially if you are relying on "passive" cooling - cooler equipment tends to run better (and longer between failures).
5. Instead of "Zip-Ties", try "Hook and Loop" tape or straps to secure your cables (Re-usable) and much easier to get that "non-detachable" power cable out when a component has to be removed/installed.
6. LABELS! LABELS! LABELS! very useful for trouble-shooting, and makes it A LOT easier to put a component back after a repair/upgrade, etc.
I hope that helps.