Everyone loves a good hashtag — #fitspo, #gym, #itswinterimhibernating. King of the photo-sharing world, Instagram is a social network based primarily on images. Just take a snap, apply a fancy filter like ‘mayfair’, ‘valencia’ or ‘sierra’, add a punny caption and voila! Regardless of whether it’s a pretty building, breathtaking tree or a delicious low-cal salad — it’s sure to look great! Similar to Facebook, friends and family can follow, like and comment on your images, even message you privately — ‘Nice salad, bro’. Newer features include the ability to live stream, along with share images and videos to a story expiring after 24 hours. Did someone say Snapchat?