I was thinking about my purchases the other day and I realized I have purchased a lot of things from people I found in chat rooms. So when you are thinking, What can I do to promote? The simplest thing is get your butt in chat! I have sold a few things and done some great trades while in chat.
Purchases from Chat 10/27
Trades from Chat 4
Items Sold from Chat 12/50
Those numbers may not be HUGELY impressive, but I mean a sale is a sale, a trade is a trade, and a purchase is a purchase. All are great, make someone feel good, and you get neat things.
You can do all this while chatting having fun and browsing shops.