What is your favorite low-tech tweek?

With all of this talk of expensive interconnects, the right plugs, etc., what have you done to your system that has been helpful but without shelling out tons of money?

In a differant thread I saw where I could use some foam insulation used for water pipes to wrap around my longer interconnects to keep them off the floor and seperated from other cables/wires. Also, I am using a pair of tall electrostatic speakers laying on their sides for audio. They are positioned at the base of my screen used in my home theatre. I didn't want the speakers flat on the hardwood floors, so I am using a couple month's supply of wine corks beneath the speakers for seperation. Finally, I got a bit tired looking at the cheap two-wire power cord that came with my Cd player and I re-wired a much better computer cord to a two-pronged plug and I do believe I have better results. That, or I should have made the best use of what the wine corks were designed to do stop with the crazy creative tinkering. So, what have you done along these lines?