Or don't! I like mirrors.

I got over my mirror addiction thanks to Kawaii Camera. I still kind of like them, but I feel fine walking around now, because I can check my pose and expression any time by glancing at a permanent, transparent camera image of my avatar floating in the corner of my vision.

Actually, I'm not using Kawaii Camera, because I built my own after finding it, but it looks like a convenient way of getting your own private mirror if you aren't into building this kind of thing yourself. If you are, you can probably figure out what is necessary to build it from watching the video.

Of course, if you're in VR, you can use the photo camera to achieve a similar effect, but this is much less obtrusive because you can make the image transparent and use your camera for other things than looking at yourself.

Features listed on the page:

A camera that shows your whole body and expression

A monitor that follows your head (only visible to you)

An UnlitShader with variable transparency

Can be toggled using an emote using EmoteSwitchV3

A video of it in action:

https://youtu.be/u5SyiAHGQqM