One way to understand energy is to recognize how we affect each other. When our antennas are focused on something that we know will help another it's really because we also need it. So, what you repeatedly insist on for other people is something you need to focus on for yourself. They may not be ready for your message, but your awareness is evidence that you are.
You'll also see that subject of your focus pop up in other ways, further reinforcing the energy for you.
Currently, my focus is on fermented foods. I've advised some clients (and nagged loved ones) to eat more of a variety because I sensed their usual fermented favorites were not serving them anymore.
Recently, I got a batch of idli from a good friend and I felt like my body really needed it. I was reminded that with each season we should re-evaluate our self-care practice, including diet, and check in with ourselves to notice the quality of our mental, emotional and physical states. You can only do so much (actually, a lot) energetically but it's your daily practice that will really make the difference between maintaining good health or struggling for some semblance of it.
Tune in to your own energy, which includes your words and reactions, and take note of the patterns. Ask yourself if you might need that thing you've been frequently advising (ok, nagging) others about. Don't worry if they're not listening. Demonstrate wisdom by taking your own sage advice.