This might be more of a LPT than common knowledge, but in the past year I've recently noticed that all my (men's) shirts have tags on the inside near the waist. If you are putting on a shirt and notice the inside tag is on your left then you know your shirt is going to be facing the right way. I hope I explained this clearly and properly. It's really nice to not have to examine my shirt first to make sure it's facing the right way before I put it on, just notice the tag is in the right place and boom.
This might be more of a LPT than common knowledge, but in the past year I've recently noticed that all my (men's) shirts have tags on the inside near the waist. If you are putting on a shirt and notice the inside tag is on your left then you know your shirt is going to be facing the right way. I hope I explained this clearly and properly. It's really nice to not have to examine my shirt first to make sure it's facing the right way before I put it on, just notice the tag is in the right place and boom.