Bangs are your best bet, if they suit you.
Otherwise you have to train yourself to stop doing your surprised or worried face when you don't mean it. I used to raise my eyebrows pretty much whenever I talked. It made me look slightly nervous all the time, which I didn't intend to communicate. So I just made it a priority to relax my brows. I'd rub little circles on my forehead area when I thought about it.
If it's too ingrained in you, botox might help you break the cycle. Then after that, use frownies in private or other methods to stop doing it.
Don't get me wrong. No one should inhibit their natural reactions. It's the habitual ones that don't communicate an accurate message that are the problem.
When you’re accustomed to privilege, equality feels like oppression.
"Power without love is reckless and abusive, and love without power is sentimental and anemic." - Dr. Martin Luther King Jr