Get it done early,
Even though many programs will take a while before they download it, they will know when it was submitted and some places they actually care about how early you turned your stuff in. Shows your not a slacker or you're really serious . . . but its not THAT big of a factor. Also, after the deadline to turn in your ERAS app . . . start checking your e-mail religiously and OFTEN. There were times when I got an interview date simply b/c I checked my e-mail right away and often and someone who only checked once a day got the e-mail the next day.