Answer: Essentially you have three teenagers and a 9 year-old who will be "like" a teenager soon. I raised four children who were fairly close together in age as well. What helped me the most was to have things going on while my children were in school. Some years I took courses at the local junior college, toward my degree, one class at a time. Some years I worked part-time, leaving after the children were in school and coming home prior to their arrival after school. Other years I volunteered with various organizations, including the children's schools.Having something for yourself that does not include the other family members will give you a mental break. Having a break for yourself will make you happier to see your children after school. It will also make you do less important things (laundry, etc.) in less time and more effectively, timewise.Are you involved in talk therapy in addition to your medication? I believe that either one-on-one talk therapy or group therapy is extremely important when addressing depression. Also, maybe try taking an exercise class to get those good chemicals flowing. Even yoga or a 20-minute walk is really good for your mind.As kids get older, the level of worries for parents rises. That said, you might want to get involved in a teen parenting group. Sometimes these groups have activities for younger children while you are involved in the group.