The first step to dealing with a moody mother is to keep your cool and not let it affect you too much. Don't take her moodiness personally, because it probably isn't about you. She may just be having a bad day or feeling stressed about something else in her life. If she's always in a bad mood, then you might need to talk to her about it and find out what's going on and how you can help fix the problem. If there's nothing wrong, then she'll have no problem telling you so.