Can someone tell me how to get rated up and down on here?

The two best ways to influence your score are: 1 invite and have accepted other military members you know. 2, By being a part of the community and posting, responding, and voting on discussions.  The first relies on other people the second is all about you putting in the effort.

If you're asking about the overall rankings, get involved in RallyPoint.  ;)

Either way, click on the down triangle in the top right hand of the screen and select "Leaderboard"...than click on "View My Influence Score Details".  This will give you an idea how to raise your ranking within certain areas.

If you're asking about the "thumbs up" and "thumbs down", that another member liking or disliking your comment/post.