The steps aren't something you do but something you live. Step 12 sums up what we need to do on a daily basis to stay sober.
"Having had a spiritual awakening as the result of these steps, we tried to carry this message to other alcoholics, and to practice these principles in all our affairs".
If I didn't practice steps 10-12 on a daily basis I would find it hard to maintain long term sobriety. Step 10 is like working a "mini" 4-9 daily, step 11 allows me to stay connected and grow my spiritual connection with my HP, and step 12 stresses the importance of helping other alcoholics, then instructs us to follow the steps as a way of life. Working the 12 steps is laying the foundation of how to live life every day.