Here are some tips:

Try to narrow down the amount of forum boards you have. Sometimes there can be so many that it overwhelms a new user and the user is confused where to post. Try to make a more broader area of a forum section to accompany for others to make it more user friendly.

Add a forum theme! ForumUp has over 300 templates that you can add and customize to your forum. It will make your forum more attracting and appealing.

Make a forum logo, adding this logo will make the board more homely, with it's own unique touch.

Have family and friends join the forum to help you get it started, it's not very fun talking to yourself on your forum.

If you have any questions, need support, or run into troubles on your forum feel free to post in the correct section including your forum URL like you did here.
Good luck with your forum!