One great thing you can do for yourself is try thinking through different ethical situations. What would you do if you were in that situation? (Or what would you do so you were never in that particular situation?) What would you do if someone in that situation asked you for advice? What pieces of the situation would matter to you? Which ones wouldn’t matter? I read a number of advice blogs, in large part because I’m fascinated by the different ways people think through situations, how they demonstrate what they care about and value, and how people who think differently than I do go about resolving things. If you’re looking for examples to think through, try AskMetafilter (all sorts of things), b (personal interactions), and Ask A Manager (workplace situations). You can read the ones that intrigue you and pick up a lot of how to think through different situations along the way.
This is the first place I've ever found someone explicitly acknowledging that the appeal of advice blogs is ethical discussion.