how can u manage multiple sites?

looking for ideas/advices

[GiveMeMore]

I have only one blog site 2 months old that has generated for me till now a little bit less than $300, I don't have an idea if the niche of my site is good or not but all I know is that I love its subject, it is my life's passion.

I am aware I'll NEVER be ranked among the first couple of pages of any search engine with it so I am thinking of having another website to get more chances with adsense.

my question is, how can I do it? I mean the niche for the second website, you can't be highly knowlegable in 10 things in life :( at least i am not. So

1) so i go for it or simply focus on my blog
2) how to chose the niche of that second website
3) how to fill the content of it if i don't have enough knowledge about the subject

thanks

[Pengi]

Stick with what you know and build a site on that that is more than a Blog.

$300 in a your first couple of months sounds good for a Blog from what I've seen here - you must be getting some traffic and some decent ads. Build a site that tells the world about all the aspects of your niche. Then grow into related topics.

This will probably be more fun for you and at least as profitable, in the long run, as loads of new blogs on topics you care less about.