A few ways you can comment on a blog or anything. The first step to posting a comment is you have to read the post and as you go think about how you like it so far or where you are at and at the end of the post think about all of the things you thought about it. The next step is to say what you can relate to the post like if it is sports then you can say like the sports that you play or if it is the sport that you play then you can tell them that you play that position and the cool plays or something that you have made. That was a highway comment an a dead end comment is when you say like cool or something to make then not be able to respond to your comment. This is how to do a highway comment and how not to do a dead end comment, I hope you use this when you comment.