Cool ideas!
I use eye contact a lot.
I try to get as far as I can with just eye contact and facial expressions.
Its almost like delaying the whole process, making her laugh or smile, or building tension non-verbally.
Its actually a bit tricky, walking up to someone and waiting a while to begin talking. There is a risk if done wrong you can come across as weird or creepy, but I don't really have that issue.
Even a wink can be cool
