Clip like size cams together
While many people find that clipping each piece of protection to their gear loops works fine, there may be some cases when you need to make a little more room. Such as:
Long pitch where you’re bringing a lot of gear
Big wall climbing, where are your harness / gear sling is always overstuffed
Alpine climbing, where you might be using single gear loops on the waist belt of a backpack, or a shaved down alpine harness that only has two loops
Multi pitch routes, where the back of your harness might have a few extras like windbreaker, water bottle, shoes for the hike off, etc.
If you have two cams of the same size, simply clip the racking carabiner from one cam to another. This clears up space on your gear loops. It can take a bit of practice to get used to racking this way. Give it a try and see if you like it.
This also works with quickdraws, assuming they aren’t too long.
(Hopefully this is painfully obvious, but you place the lower hanging cam first, and not the one on your gear loop, to minimize the chance of dropping both of them.)
If you’re fairly short, and/or your cam slings are a bit long, remember the climbing rule of thumb of avoid having anything hanging below your knees. Don't want to trip on your gear when you do that high step . . .