Flash, you already had some great advice. I want to add another method I'd like to use to find limiting or just incongruent beliefs.
You can look at other people around you, especially about things you don't like about them. This often points back to issues that you have with yourself.
Limiting or incongruent beliefs will eventually lead to what I call "fighting reality" - and I've written an article on my blog that you might find interesting:
2 Ways To Stop Fighting Reality | TobiasZimpel.com.
If you have questions about this, feel free to ask here or in a PM, or comment on my blog if you like.