There are many tips and tricks to boost the reach of your post, but by far the easiest and, arguably, the most beneficial way is to TAG people.
Who do you tag? Tag people featured in your picture, people relevant to your business and career field, people that have done a great job, people who are looking for information. These tags will send your post 10x further than one with no tags. Tagging allows more people to see your post.
Take it a step further. Not only can you simply tag people in your Facebook comments and pictures, you can also use hashtags and cross tag into other social medium like twitter.
Remember on Twitter to ad their identity that looks like @name to the comment so they can see your remarks and hopefully retweet.