Suggestions for Costa Rica

Hey everyone. I’m headed to Costa Rica in February for 16 days of bliss with my new wife. We know where we’re staying already (1 night in San Jose, 5 nights in Quepos/Manuel Antonio, 4 nights in Monteverde/Arenal, and 6 nights at Playa Hermosa in Guanacaste), but I’m interested in hearing from anyone who has suggestions on what to do in any of those places.

It seems like there is a lot of competition from tour operators (canopy tours, hikes, jet skis, deep sea fishing, snorkeling, white water rafting, horseback riding, etc.), but it’s very hard to differentiate one from the next based on websites and guidebooks.

So, if anyone has suggestions, speak up. If you feel like sharing any pictures you have, all the better.