Controlling 120v AC

So, anything we can or should do to help eliminate noise when controlling 120v AC?

I'm wondering because I've seen in some old threads where people doing similar things (building a controller for a fish tank) had "noise problems" from their SSR circuits, but I either didn't see or didn't understand the solution(s).

In my application, the arduino will be in an enclosure several feet away from the relays, which will be built into a powerstrip of sorts.