"It is not how much you drink, it is what drinking does to you." Big Book p. 443
You might think you don't need to keep sober because you think you didn't use that often. But, don't compare yourself out of recovery because you didn't drink or drug as much as the next person. Instead ask yourself if drugging was somehow a part of your bad experiences. Ask yourself if you would have behaved differently if you had not been using. Did using make you miss appointments, birthdays, family events, work events? Was it involved in your landing in jail or hospitals? It doesn't matter how much or how often you used; what mattered is what it did to you and others.
Make a list of events involving alcohol, drugs or other addictive behaviors that interfered with your life. Be careful not to blame others even if you think they were at fault. If a certain behavior (like drinking or drugging) resulted in trouble, make a commtment to stop because the rewards from that behavior are not worth the consequences.