Definitely set your alarm clock! Be sure to set it with enough time to get to your computer, get it turned on, and get to the reservation page before your window opens, as you want to be booking the second the system lets you. When your window opens try for BOG first, then CRT, then do whatever other ADRS you want to make. BOG is the hardest to get. If you don't get BOG tomorrow keep trying in the 6 months between now and your trip, cancellations do happen. Hopefully, you will not have any trouble getting CRT- you still might not be able to get the exact time you want- but I always am up and on the computer the second my ADR window opens and I have always been able to get at least something at CRT.