redirect back to where I was before action?

Pulling some code from Rick Olson's acts_as_authenticated, roll
something akin to this following code. This requires that you're using
sessions.

def redirect_back_or_default(default)
    session[:return_to] ? redirect_to_url(session[:return_to]) :
redirect_to(default)
    session[:return_to] = nil
end

Note, you'd want to put this in a file that's accessible to your
controller or view. So application.rb or a global helper or in a lib
file called on load would be two good bets.