Newbie--What Do You Think Of My SEO Plan?

I recently created an Amazon review site for kitchen appliances (25 reviews on the site so far, and I'm adding to it as I go). Here's my SEO plan so far:

Content is lightly optimized (using the main two or three keywords once or twice in the article and other variations a few times throughout) to avoid over-optimization penalties.

I created a Facebook group (with about 800 bot likes from Fiverr--I read that this was helpful but am doubtful about that and obviously open to opinions) as well as accounts on Twitter, Google Plus, LinkedIn, and Delicious. Whenever I post a new review, I immediately link to it from these profiles.

I'm writing articles for Web 2.0 sites like Squidoo, Tumblr, Wordpress, etc. I have a whole list and am working my way through it. Linking to my review article as well as a related Wikipedia page in every article. I'm using different anchor text every time, except where I'm using the URL as anchor text.

I'm creating videos quickly summarizing each review with Animoto and posting them to Youtube. Linking to the review with the site URL as anchor text.

I'm commenting on cooking, product review, and healthy living (some of my reviewed products are blenders and juicers, so this seems like a natural thing to do) blogs and linking back to my site--usually through the "my website" link that uses the commenter name as the anchor text. I'm varying the names and making sure to add real value by asking questions, giving opinions about products, posting recipes and tips, etc.

So far, that's it. I'm concerned about doing anything too spammy and getting penalized. After about a month, I'm getting 10 visitors per day. That could obviously be a lot more, so I'll continue to build links and add content.

Any suggestions at all would be appreciated. Thank you so much! I've been lurking for a while now and am proud to make my first post.