Most of my items were rejected first time they were submitted. It’s a good thing. They’re now (mostly) better because of that original rejection.
Also quite a few of my submissions were never approved.
But you get a use parts of those submissions in other projects.
Always have two or more ideas on the go at the same time. After you submit the item, close everything and start working on a new better idea straight away. (Don’t just sit there hitting refresh, you could spend those hours working on something new).
Yes an autoreply (and check it works – sometimes the gmail autoreplier does not work with marketplace contact forms).
Also leave a comment on your item pages and put a note in the “Support” section of your item pages to inform people that you will be away and not able to answer questions.
I don’t think I’ve ever been on a holiday without a laptop, I would be anxious the entire trip. What if something happens! lol. VPS went down (swapped out) on one early vacation with the wife and I haven’t been able to relax since.
It’s probably better to have your own landing page until you reach Elite author level. Once you reach Elite author level you will have access to better Google Analytics reports on your marketplace item pages.
There’s a similar discussion here if you’re interested:http://codecanyon.net/forums/thread/elite-google-analytics-google-adwords/126380