The game is getting some negative press right now and I think a step-up in the marketing might help. I have a few suggestions here. Feel free to add your own two cents but here's mine:
1) Add interactive options to the website
The marketing articles and pieces coming out might have some great info, but many people won't read it without some excitement or interactivity. The whole website feels like a dev blog right now, which should be just one component. I'm going to go on a limb here and point out the SWTOR website as an example. Pre-launch Bioware added a ton of interactive options to the site, ship models, and short video clips that told the backstory of the game (strategically released one episode at a time as the game got closer to launch). Say what you will about the game itself, but the pre-hype for SWTOR was insane and I think the website had a lot to do with it.
2) Reconsider the strategy of selling physical items to market the game.
I'm looking at the Hero's Guide and the Poster Book when I type this. Cool ideas but most people won't buy these items. A cheap basic strategy guide would have gotten more attention. As for the poster book, Amazon discounted it after the first day so I'm assuming sales weren't all too great (It's a bit embarrassing when the announcement article lists the $25 price point with a link and when you click it you see it's been discounted to $18). More free wallpapers and digital downloads through the website would help increase exposure a lot more (and draw attention to the website and its forums).
3) Rendered videos/live action
I have mixed feelings on this (mostly because I know that they're really costly to make). Not to harp on SWOTR again but once again the pre-hype to the game launch was pretty staggering. I already mentioned the interactive options above but the rendered videos helped a lot too. Skyrim live action ads got on TV and got a ton of YouTube hits so it makes sense that ZoS decided to try it for ESO. The issue I have is that they were telling a story...that suddenly stopped. I don't know if there's another part coming out, if a part was coming out but was cancelled, or if I'm supposed to get the rest of the story by playing the main quest. It's super unclear and that doesn't sit well.
I don't always drink Skooma, but when I do I go to the Southwall Corner Club. May you walk on warm sands my friends.