How does one revive forums

Post and comment more. Forums have a snowball effect where people commenting and making new threads encourages more of the same. We just don’t have enough people posting outside of a handful of popular topics

Just reply to every thread. Be the forum commenter you want to see in the world.

Post and reply to threads. 

People keep telling me to reply to threads as if I already don't, it just gets difficult when there aren't any threads to respond to lol