I recommend you look at what interests you -- such as DIY stuff -- and then start getting to know the existing community. Are there problems in that community that you could solve with a highly targeted forum? Are there gaps in the information/community online? For example, if people are interested in building their own widgets, and you see that there are no widget building communities available, than you could fill that hole. Alternately, maybe there is a widget building community, but it's too heavily moderated and people are unhappy. Create an unmoderated widget-building forum.
Just some thoughts...
|