Keeping your Japanese

A few years ago I returned to the states after living in Japan for 3 years.  Fellow 4-chaners who are fluent and don't live in japan -- what do you do to keep your japanese up?

I wouldn't say I'm fluent, but I read japanese books, use ipod apps to keep up on vocab, read websites such as nhk and mixi and correspond with japanese people/ other japanese speakers.

I was in Japan for 3 months. What were you doing while you were there? Any plans to return?