2. Small wins, that's my motto
One thing I've been doing lately is putting my post image after my first paragraph of text. When it comes to SEO, I think it's safe to assume more weight is given to what's at the top of a post. I'd prefer that to be my well-crafted, keyword-rich, smooth-flowing first paragraph instead of all the code that comes with an inserted image. Honestly, I don't know that it makes a ton of difference, but I'm all for tiny advantages wherever I can get them. In any case, do not forget to rename your images before uploading them to your blog and use alt tags at least.