This is the attitude that built bitcoin in the early adoption phase. That changed when speculation took over and the question became "What is the bitcoin ecosystem doing to make me rich"?

My efforts include asking if they take bitcoin at every sale.

Talking to small business owners about what they could have saved on that sale using BTC.

Only using bitcoin online. If they wont take bitcoin I tell them "too bad, I would have bought from you". Then I tell them where I will go to buy the same product.

Printing and distributing info-graphics, buttons, etc. All paid in BTC, of course.

For a few friends, I give them some bitcoin with their promise to spend it or donate it somewhere.

Making a point of patronizing restaurants, bars, and other places that take BTC. I do this both locally and when I travel.