For example: Whenever you walk into a store, ask if they accept BTC or cryptocurrency etc. ? Even if you know they don't. It primes the cashier or manager to better acknowledge the next customer who asks a question like this and also starts a conversation or beginning to something new.
What would be your idea?
For me, the easiest way to grow bitcoin is to spread the knowledge about it to your friends, family, etc. and as soon as they get the concept and the objective of bitcoin they will start disseminating the information to other people. It is like a chain, we are going to pass what we know in order for the bitcoin to grow. And if it will grow soon then is price will also grow.