K.S.
Here is what was important for my sanity when I made the shift:
1) Find a play group/moms group and get involved both for the kids and for Mom Nights Out.
2) Consider getting involved in ECFE classes or activities in your area.
3) Decide on at least one activity or interest you have outside of your children (volunteer work, sport, or hobby) and then schedule a time that is for you to do this each week without your children.
4) Remember to have fun!