At home, these tangled wires were difficult to differentiate. We don't have enough outlets for them so we don't keep them plugged in. Every time we picked one up to plug it in, there was a small amount of confusion as to which was the right one. Sometimes I'd pick the wrong one and have to plug another one in. My girlfriend thought about adding a bit of colored tape at the base of each plug to make them different. Now we have orange for coffee, yellow for water and purple for toast.
If you're into interior design, she also has a blog. (written in Finnish)