1. Play to your personal strengths
Social media is best when it's you (or a version of you). Authenticity is key, so start with what you're doing anyway and take it online. If you're already taking photos all the time, then take an extra minute to upload your best to Instagram a few times a week. If you often jot down ideas, think about how you can turn them into blog posts.
2. Play to your industry strengths
People respond to (and in turn share) content that speaks to them. If you're in the B2B space, photography might not easily work for you, but nearly everything else lends itself to visuals. Think about how you can use great imagery as a hook to your ultimate goal.
3. Don't overthink it
Keep it simple or you'll become overwhelmed and you'll give up altogether. The best blog posts are often the 300 word stream-of-consciousness (with a little editing) that you dashed off as soon as you sat down at your desk in the morning, because it was what you spent your commute mulling over. Write, edit, post. It shouldn't feel like an essay so don't turn it into one.
4. Think long term, but don't overinvest
It takes time to build up your social media presence. Don't worry about views and follower counts. Focus on great content, posted consistently. Followers will come. Be realistic though -- the social media space moves fast, so what's big today might not even be around in two years' time.
5. Little and often
10 minutes five times a week can be better than one hour once a week. Having said that though, do it how you want and remember that any time spent on social is better than none at all.
6. Listen more than you speak
It's like a dinner party. Don't mention politics or religion, and spend time getting to know your community. How can you expect anyone to comment on your blog posts and RT your tweets if you're not doing the same?
7. Be judicious
Decide how you want to spend your time and efforts, and stick to it. You don't need to be on every platform, just the ones that will provide you with maximum output for your efforts.
Set up systems that automate as much as possible. Investigate tools like "If this then that" that cross-posts from one platform to another.
9. Look for the quick wins
What is the big issues for your industry? It doesn't take long to write a 200-400 word reaction to what was in the news today related to your area of expertise. Dash it off and get it published. News hijacking is a great way to get your voice out there.
10. Have your end goal in mind
If you know what you're working towards, you can more easily know whether something is worth your time. Map back from your desired end point, and think through the user journey someone might take to get to you. What you want to do is make all your assets work as hard as they possibly can to help you reach your ultimate goal.