Start to study spanish

Now I am working in bogota office of our company and I have found that most people here just speak spanish, just a small part of them whom I supose are well-educated can speak english. Having been living in bogota for more than 3 moths, I've found that it is necessary to study some spanish. Sometimes it is really hard to commmunicate with people without speaking spanish. Actually I started to study spanish in 2006, but gave up later for some reasons.
So if anyone has any good idea about studying spanish or any good resource, please let me know.