Just work hard. I have a full-time job and a two years-old son. Of course, I will think my wife for support. Everyday, I wake up at 7:00am and leave at 7:30. Study for about one hour before work started at 9:00. After work at 5:00 pm, run half-hour, take a break and eat dinner at school. Study from 6:30 until 11:30 pm. Go home, take a shower, and go to bed. Try to remember what I learn from today until fall into sleep. You can ask your boss for a short vacation time (1~2 weeks) if you really feel a full-time study is required for you to make a breakthrough. I am glad that my nightmare is short (I started at the end of July and took exam two days ago) and over. The bottom line for 在职的人 is that we have to work extremely hard, plan well, and keep ourselves fit. Here is the summary.
Wake up early than a rooster; Eat more than a pig; Fit like a donkey.