I agree with this, Good Ideas from aplant too.

I do like this forum and love the fact we can get on so well, we can even have heated discussions at times but we just leave them in that thread and get on with the rest of it.

I think FB would bring in some new members though?

Could some of the MODS, send emails to some of the older members to invite back to the thread or have threads with default notifications unless unsbscribed manually.

Maybe send a bulk mail to ALL members via their emails advising "Hot Topic" of the day or week etc?
A man is but the product of his thoughts what he thinks, he becomes.