If you have a smartphone, there is this app that I personally love called SAM (self anxiety management) http://sam-app.org.uk/ . It's quite amazing and has a lot of tools for different kinds of anxiety at different intensities. If you don't have a phone that can download this, you could message me and I could explain some of the different things it helps me do that you could do without the app, which there are a fair amount of. It has examples of breathing exercises as well, because there are a multitude of different ones. If you ever have high intensity anxiety, than other resources tailored to that should be sought, however for an everyday sort of pang that just hits you every now and then, these are great tools for acknowledging those feelings and keeping your cool. And again, if you can't download the app, just message me and I can tell you about some of the stuff it teaches you how to do to cope.