Protecting comics

While I haven't thought of protecting comics, we do have other things we like to protect. My advice is to invest in those plastic sleeves designed for the books. A cool, dry place preferably a safe would come in handy. That way the temperature remains consistent. Another idea is a given but some honestly don't think of it. Be careful who you loan them to. Somebody may not appreciate the value & would be heavy-handed in how they hold them.
What do you do to protect your comics?