I have had the same Visa and AMEX cards forever and they are my only two credit cards. Always paid in full. However, there have been a few credit card deals lately that I've been interested in exclusively for the enrollment perks (primarily Visa). So, my question is: What are the credit rating implications of getting a few (2-3) more cards (that I'll seldom use)? What about when I cancel the cards (likely after the first year)? My credit rating, last time I checked was 780ish, IIRC.