Ah! I see the problem now. Though I'm not sure I'll be of much help - I usually have more things to do than time.

I think what you're doing here is a start, really - letting people know that the tours that you're guiding are available is good. The more people know, the more people will want to do that - and the less you won't have things to do.

Until then - hmm. Practice things you have learned, if anything is appropriate for where your location is appropriate? Or going through things you have memorized - sometimes, it's good to refresh it. Do any of these sound like they might work?