I like this article. The advice is very basic, but that's all you need to get started in the right way.
What I would add is this: Make sure you understand how each of the social media platforms you use work. On Twitter, for example, you shouldn't add more than two hashtags to your Tweets, while on Instagram, you can go up to 7. Just make sure that they are relevant.
You don't want to draw attention to your brand or name for the wrong reasons.
Read the article at http://blog.hshtags.com/articles/intro-to-hashtag-etiquette