Random reality tests (nose pinching & breathing as described above) through the day works as you might randomly do it in the dream, but what I find works better is finding patterns in your dreams where something isn't right, and do tests against that while awake.

E.g

• light switches rarely work for me in dreams, so start doing reality checks when you flip a light switch.
• I always have problems with my phone in my dreams, so whenever my phone is acting up do a check

It can be anything though, maybe you drive your car a lot in your dreams so every time you get into your car you do a check.

You can find the patterns more easily by increasing your dream recall which can be done by keeping a dream journal.

When I was doing frequent checks and keeping a journal, at my peak, I was having lucid dreams 3-4 nights a week, and each night I'd have 3-4 lucid dreams. I've stopped journaling, and only really do reality checks if something really weird happens nowadays, and I'm still lucid dreaming 1-2 times a month now. The length of my lucid dreams are much shorter now as well though.