I just came across this lens on Squidoo and I was so impressed with the title I had to talk about it.
http://www.squidoo.com/morphsuits-and-cheap-morphsuits
The title is
Morphsuits and Cheap morphsuits
Now, you don’t need to know what a morphsuit is to appreciate that title. Apparently it is some sort of a bodysuit.
What I like about the title is the main keyword – Morphsuits – is in there twice, and an awesome buying keyword (CHEAP) is also in there.
I guarantee you that most of the people hitting that lens have their wallets open and are ready to buy.
The only thing I may have done differently is I may have titled it like this
Morphsuits and Cheap Morph Suits
I am certain there are people searching for morphsuits that don’t know it is all one word.
If I really didn’t want to break the word up in my title, then I would have put morph suits in at least one module title and in the text at least once.
So how does this apply to your lenses? Are there any ways that you can see how to make better titles in the future?
By better titles, I mean when you draft a title, can you put your keyword in there twice? Can you include a buying word? (if your purpose is sales).
Like I have said in my book, I have done well with short titles that only have the keyword once, and I have done well with longer titles that have it in there twice. I lean towards longer titles but on a good trending topic anything can work.
You just need to get out there and start trying things and see what you like best!
p.s. whatever you do, don’t change the title of any lens that is doing well – it is a sure fire way to lose search engine traffic for a few months. Think about this with your NEW lenses. 
Keep making lenses! Lisa