@webmaster, Here are some suggestions for you to increase the revenue from website.
* Try changing the ad places since you are not getting best out of google adsense. You may add a banner or a leader-board ad below the 2nd or the 3rd reply. You can also remove those 2 adjacent 336x250 ad blocks and add a single leader-board there and use 2 leader-boards under say 3rd and 5th reply or may be under 2nd reply and at the end.
* Since this one of the best forums around the Globe with the alexa ranking of 13376 and in Pakistan ranking is 325, Open an online store and sell products like shirts, key rings pens etc with the forum logo at premium prices.
* Or even you can hire a designer and designs some some graphics and sell them to the members with their name on that and their achievements and D.pk logo and some more interesting details
* Add some monthly/yearly subscription plans for members.
* May be you can make a private area and provide something special like high profile analysis and inside news, rare images and things like that.
* If any artist want to sell their defense art give them an international platform and in return get a part of their earning.