Any tips on how to deal with inferiority complexes?

Any tips on how to deal with inferiority complexes? I've had one ever since I was a kid but it has been particularly ridiculous lately. I can pretty much find something about everyone I meet that makes them highly superior to me. When the other person and I get along, I can deal with it. When we don't, it's sooo much worse. I am aware this is not healthy and I don't want to pay for therapy. Any non-therapy tips would be helpful. Thanks