I check for comments and respond and I always try to hop hubs. While hopping, I comment and vote up, etc., if they are well written. I also flag inappropriate hubs.
One thing I stumbled on is looking for the latest Hubbers and reading their hubs & welcoming them to the site. I've only been on here a few weeks, and it meant a lot to me to be welcomed. I know there are some designated greeters here, but we are a community, so I want to be welcoming.
Reading hubs from very new members is interesting - I've spotted underage Hubbers, people promoting illegal activities, hubs that weren't in English and a variety of other issues. It's especially interesting very early in the morning.
As for writing - too new to have a regular pattern, but I'm working on my 30 in 30. So far, 18 down, 12 to go. About two weeks left.