The first and most important was that I made my own friends. Second was to put effort into developing my spiritual life: God as I understand God, etc. which is now a great source of strength and balance for me.
Also, at that point I started working at making my life what I want it to be on several fronts: professional (went back to school for a professional degree), personal, home life, relationship with my child and extended family. The New Year's after my now-aexh took up with WhatsHerName, I made six resolutions, and I kept five of them by April... which from a chronic procrastinator was not too shabby. I was totally astounded by what I could accomplish after I stopped being ruled by fear and really, truly went for what I wanted no matter how scared I was. It was strange, I was devastated by the loss of the potential to repair my marriage, but at the same time I was also surprised and delighted to find out how much I could accomplish on my own.