Finding positive activities to fill what feels like the void is something I too have found difficult.
I can't tell you what will work for you, but I look forward to doing some of the things I haven't been able to do while drinking and also looking at how much better I can do some of the things I've been doing while drinking.
I also know that working at breathing easy and being in the moment are cliches that pay off big time when you get them going for you--it's worth trying/reading about as much as you can I think and a big part of my plans even for tonight.
I hope you have a great evening; I'm rowing in the same boat, so at least you have company!