I had (and I'm currently dealing with) a similar problem after realizing I did not like the direction my life was taking. After deciding to watch my cannabis consumption I bought a vaporizer, now I probably spend as much time smoking but because the high from vaping barely has that couch-lock effect for me its a lot easier for me to do other stuff AND get my smoke on!

Hence, I keep my decision to smoke less but vap instead.

Smoking doesnt always help with depression because of the whole being-lazy-and-thinking-to-much effect smoking can have.

So like other people said: Find some activities, try to keep a positive mind set, and stay active!