The only guy, you could follow this list for each domain:
1- install a wordpress basic theme and plugins like all-in-one-seo
2- put some posts about web niches (5 to 10)
3- link each other domains and posts
4- submit to some free directories
5- submit to social bookmarketing sites
6- have a person (maybe your little brother) to post once in a week
7- put up some ad program (maybe kontera or adsense)
8- wait 6 months (the time to they come out of the sand box and gain some pr)
9- sell them
