Always run your cold water first thing in the morning until you feel that "water main" temperature in the faucet. Same thing when you arrive home if you have been away all day. Same for the hot water.

And, if you have a lead entrance, replace it with copper or Kitek. I prefer type K copper but get quotes on both. If you go with Kitec (plastic) you may will have to install a new ground for the electrical system.