Hi! Just jumping in here. Your paintings are fabulous. I agree with what everyone has said so far. Here are some more pointers.
Let's look at this item:
http://www.etsy.com/listing/89753620/7x14-mystic-dock-at-sunset-originalFirst off, your title needs to be rearranged. It's true that the first 3 words are the most important. I would do something like "Canvas Painting - 7x14 Mystic Dock at Sunset - Acrylic". You have to think what would some one type into the search box. They are more likely to search for canvas painting or painting than mystic dock.
Secondly, I think the second photo you have should be first. It's a close up and makes a statement. Also some of your photos could be a bit brighter. Use picnik or another free service to adjust the exposure and brightness.
Prices: I cannot comment on your prices, as I don't paint and have no idea what kind of effort you've put into them. Maybe look at some of your competitors and see what their prices are for similar items.
Tags: I think you have some strong ones, like canvas painting, acrylic painting, landscape. I would take out mystic, camping, eerie for starters and replace them with landscape painting, nature painting, sunset painting. Again, think about what some one would type into the search field. I've found craftopolis.com, they have a tag report on your shop. This has helped me fix some of my tags because it shows what people are actually typing in to get to your items. Oh, and it shows what page you came up on.
I started tweaking my tags, titles, and photos at the beginning of December and have had 3 sales. I agree it does take time to get going. Don't give up. I don't think you need to list everyday, but you do need to be active in your shop everyday. Whether that's participating in threads, teams, discussion, critiquing other's shops, posting items on twitter, facebook, etc. It's hard work, but I promise it will pay off soon.
Best of luck.