I think it's a great idea to be active on most of these methods here, but one thing I have found from personal experience that really can make the depression sink to a new degree is the imaginary conversations. Sometimes you end up dwelling on what you both had at one time, the special laughs you used to share, etc. Be very careful with what you imagine in conversation. But, if you're too modest and stick with generics ("Hi, nice to see you. That is good. Ok goodbye.") you might be setting yourself up to feeling quite empty, feeling as though there should have been more to it than just that. Just my two cents for that department. The rest of the techniques seem to have far less negative possibilities.