Who is your target audience for this site? As @storymakerechidna says, the subject matter is very diverse, and I find it hard to picture a target audience to whom the site as a whole - rather than just one or two individual posts - might appeal.
Even if you think about just one area of your site - sport, or technology, or whatever it might be; who is your target audience for that section? More importantly, why should they choose to visit your site, rather than one of the many other sites covering these areas? What do you have to offer that other sites do not?
It seems to me that your site has a huge amount of competition, as you are competing in so many different niches, so it's going to be an uphill struggle. I think you need to identify your target audience (or audiences) and work out where best to focus your efforts, rather than just generalised social media activity. You also need to give them a reason to visit your site.