I thought Mother's Little Helper was about speed:

http://www.youtube.com/watch?v=8T9Aa1V5oyo

But it's about Valium (diazepam) according to http://en.wikipedia.org/wiki/Mother%27s_Little_Helper

I'd think Speed would have helped mothers more than Valium, but my mom used to say that she and her neighbors just had martinis instead, and a Valium's just a much stronger version of a martini. Ah- the 60's.