Use hashtags relevant to your picture but not too competitive ones. If you get 2000+ likes you should be able to get on the "popular posts" for a hashtag with ~1,000,000 posts Be sure to not pick too competitive hashtags, look at the current top posts and see their likes and then draw your conclusion if you are among those numbers. I have a 45K account that gets 2-2.5K likes per post and adding a hashtag with 1,000,000 posts on it gets me on the top posts. That usually increases my likes by ~300-500. Obviously the more popular the hashtags is the more it will boost your post.