Running is a great way to keep your mind and body busy. Bicycling is another if that interests you and also walking. I also find yoga and meditation helpful. Going to a movie helps me as well. Or napping or going to bed. Doing a puzzle. Meetings if you are into that or meetups for different activities you enjoy.
Having a plan is helpful for me. As was knowing WHY I didn’t want to drink anymore and HOW it was affecting my life and decisions and relationships. I thought a lot about who I wanted to be as person, how I wanted to live my life and how I wanted my relationships to be.
I also read a lot of sobriety memoirs and books on recovering from drinking. That was very helpful in enlightening and inspiring me. This Naked Mind was a good starting place and also Stop Drinking Now by Allen Carr is a good read.
Being active on sober forums was also very helpful for me.
Here are some (Resources for our recovery)