go in the commercial and atp gliem books and study the weather questions....have a good idea of why you want to be there and fly turboprops instead of jets. also, get on flight sim and fly the ILS 22 into LGA and practice holding....the full motion 1900 sim is sweet and can be challenging if you are under prepared. know the systems of your current multi backwards and forwards, and be able to read TAF's and METARS like the back of your hand (which I'm sure you already can). go to aviationinterviews.com and read the gouges, they are helpful. if you show them you are sharp and confident right off the bat you won't get as many technical questions, but it’s my experience that every interview at Colgan is somewhat different....some guys got asked more questions that were more difficult, some guys came off well and didn't get as many. Just make sure you are good on the written and the instrument stuff because busting the sim and/or the written will result in an automatic dismissal. I just interviewed there a little while ago and was offered the position on the spot, however I spent a lot of hours preparing. Study hard and you'll do fine, best of luck!