Rocket Languages is a very useful program. I've only had it for a short time and I'm already impressed with the content. It is the most affordable language program out there, and also has some the best content I have seen from a language program.
It's very useful for jump starting your conversational skills, and it goes over a variety of subjects. The content is awesome, but I am the most impressed about the affordability of this program, would recommend to anyone on a budget.