Lots of people have ideas on how we could speak to aliens, or learn to do so, at least. Wired Science, in an article I didn't know about when I wrote about the same thing, said scientists think should first learn to talk to dolphins.
eHow, on the other hand, takes a more serious approach, recommending that you meditate outside in your underwear. That may seem weird, but it's just a preface to telling them you want to make the sexy times with them; eHow's tip number 7 is:
Ride in their ship if you like. You may not have a choice. Establish an ongoing relationship with them by telling them you want to participate in their breeding program.