Some recommendations for evaluating your practice.

If you chance upon some form of practice - spiritual, personal development, otherwise - why would you want to evaluate if it actually works, when you can just go with it and see what happens? Here are some reasons: Because you've fallen for charlatans before. Because you have to invest your time and money, and both are precious to you. Because you know humans are biased. Simply because you're curious, and you want to know how the world actually works.

So... do you want to know if it really works, or do you just want to feel good? Both are fine, but if you do the latter, please don't pretend like you know. Be honest with yourself and others.

Journal your experiences.

Do you journal only the affirming experiences, or do you try to write down the negative too? Again, both can be good practice, but you need to be clear, be honest. Don't lie to yourself.

When you look for external proof, actively try to find sources that contradict, criticize, debunk your practice. Repeat that process after a while. New research may have surfaced, and your experience might have sharpened your eye.

Ask yourself: What do I do to account for the placebo effect? What do I do to counter my biases - most importantly, how do I deal with selection and confirmation bias?

Don't keep to your social media bubble. Try to actively seek out places where you are likely to encounter opposition, criticism, skepticism.

Do you try to be in-line with up-to-date, peer-reviewed science? If not, do you openly admit this being the case? Don't quote scientific literature if it agrees with you, but then when challenged, retreat to "it's not science, it's a lifestyle", "I really don't care about science" or somesuch.

Do check from time to time whether the ideas behind your practice are consistent with the rest of your worldview and generally accepted facts.

Perhaps the most important recommendation: Start prefacing your claims with "I think", "It might be the case", "I suspect", "I'm very confident" etc. Whenever you can, add the reason for why you think this way. It might seem silly, but it will change the way you relate to your own ideas - you train yourself to apportion your beliefs to the evidence and have good reasons for believing in them. I.e., it will make you more rational.