The title says it all. I don't have a big plan myself, but have some small actions in mind -
I added the atheist "scarlet letter A" to my personal blog, which has had over 24,000 visits in the past 2 years. Even though my blog is nonpolitical and does not relate to religious or areligious thought (it's mostly a garden diary), the presence of the "A" gives visibility. Also, for my friends, coworkers, and family who check the blog, it is a way to more clearly state my position without personal confrontation. As someone who is fairly shy and avoids conflict, this is an open yet fairly safe way to express how important I think it is to be "out".
Next week I will express to management of my workplace that some of the Xmas decorations were not appropriate (especially a cabbage-patch-doll Jesus Mary and Joseph), and ask that policy be developed or enforced to prevent such displays next year.
I'll be more open in my conversations with others as to my stance on being atheistic, and more openly supportive the the atheists who I know.
What plans will you make?