The best tip that I picked up from a thread, and that I have used over and over again is this: How to save a listing that you have made, but you don't want to publish there and then. You might already know this, if not this is how you do it:
You make your new listing. When you arrive at the very last page, where you normally would hit "finish", you "add" it to your "favorites" in your toolbar instead. Pictures and all. I have a section in my "favorites" called Etsy Listings, where I store them until I'm ready to publish them. When ready to go public, you sign into your Etsy shop as normal, you click on your toolbar "favorites", select your listing and click "finish". Believe me it works like a dream, and for me it has been a huge time saver.