I got all my letters. I haven't wrote my personal statement or entered in my CV into ERAS. Am I behind or is September 1st when we should have this stuff completed?
You are way ahead of the game. You can't even begin to apply until September. The LOR's are the part that is out of your control. You could do the rest of ERAS in a weekend.
But I would say (based on advice from my adviser), start drafting your personal statement. Don't wait to be 'in the mood' to write, just sit down and start. get something down. That way you can start getting people to edit your essay sooner rather than later. (ex: i just drafted mine and i'm sending it out to people to read now, so that i can have it finalized over the next month or so).