Post less and only the best!
5 years ago I thought posting as many photos as possible was the best solution. But I soon realised you have more impact with one amazing photo than you do with 100 average photos. The point is to make you focus more on the finer details of photography. Work on the quality of your photo. By choosing one photo to post out of 100 photos you will hone your skills in editing and post production and soon people will be waiting with baited breath on your next post. By posting multiple photos at one time it can water down the impact you have on your audiences, unless you are trying to tell a story by posting multiple photos. If not then try and allow the one brilliant photo to tell that story for you.