Hi there,
I helped my best friend scramble last year. Here is how it worked for her. She received notification on the Monday before the Match that she did not match. On Tuesday, she reported to her Deans office at 10AM. She had copies of her ERAS application and had access to a computer.
At 11:30 (her Dean gave the scramblers the Scramble list 30 minutes before it was officially released), she made a list of programs that had vacancies that she wanted to apply to. At noon, she sent ERAS applications to unfilled programs and faxed her ERAS application to others. (Last year, you could use ERAS for the Scramble unlike in previous years).
By 12:30, she had phone calls from four programs that wanted her and had signed a contract by 1pm.
The key to the scramble is having a fax machine handy and getting the list of unfilled programs as early as possible. This list goes to the Deans offices at 11:30AM and to everyone else at 12 noon. By getting the list early, she could apply to programs and hit the "Send" button at noon.
The other thing is that you do not want to be trying to scramble into a competitive residency. There are not many categorical general surgery, orthopedic surgery, anesthesia, emergency medicine or ENT slots out there on Scramble day. There are a good number of Internal Medicine, Pediatrics and Family Practice positions out there.
If you are applying for a competitive residency make sure that you have applied to enough programs to have 10-15 interview invitations. If you do not get enough interviews, you may have a difficult time matching. It does not hurt for you to apply to your dream program and rank it first if you manage to interview there but you NEED to have enough interviews. My friend made the mistake of not applying to enough programs and thus she had to scramble into Internal Medicine. She managed to get into a good program but she was fortunate.
I hope that this helps and and Good luck!
njbmd