Definitely quit the nicotine first. It's so much worse for you. I didn't know that about Lexapro (I'm on it too and I smoke). I need to take my own advice.

Trying to quit caffeine AND nicotine at the same time is a tall order. Just take it one step at a time. The last time I quit smoking, I actually found it very easy to quit caffeine a month later. I was feeling healthier -- not putting that vile stuff into my body -- so coffee didn't seem as appealing. I also used to smoke with my coffee, so I didn't enjoy the coffee as much after I quit smoking. I started drinking herbal tea instead and loved it.

Unfortunately, I slipped and I'm back on both of them. Ugh.

Good luck with quitting. You can do it. You're taking a positive step for your physical and mental well-being! Yay!!!