First, take a close look at the board you intend to post to. Each board has its own theme, rules and community that expects to see what the board is for. Try to keep all of these things in mind when posting and design your post to reflect the interests of the community.
Second, make sure your post title and content are correct. Users don't know what you want to convey to them. In the title of the post, summarize the main point of the post. Avoid general unnecessary phrases, try to convey the essence. Respect other members of the community, do everything to make your post look good and understandable.