keeping your wiki strong and healthy is very important so take these into consideration

1. update your site daily
2. make useful guidelines
3. letting people know about the wiki and you in further detail on your profile
4. make your wiki useful say like dont make it worhtless or rascist!
5. come on its free,dont be afraid to do as much as you want on it!

some other places to check out would be about wetpaint sites,and top 10 site tips