Well, the sleeping pill one is when I went to the therapist the first time and he said our first step was to get me sleeping before I had a nervous breakdown, which according to him was days if not hours away from occurring.

So, he wanted me to contact my gp for sleeping pills who said that was a mental health issue and I had to contact my mental health section of my insurance who said I had to see a psychiatrist, none of whom could see me until Jan (and this was way back in mid-Dec.). It was a frustrating experience and I vented that one day.
Barbie one is something I always say. It's from a Barbie commercial I remember, and when someone says can you do that or you can't do that, I respond "I can do anything. Like Barbie."
And the Angel one was when Angel took a vow of jolly for the month of December when everyone goes crazy and said she would NOT snap at anyone and I just wasn't in a Christmasy mood and said what the tag says.
They all came from the Riddlers thread.