When making manual web2.0 for authority sites...

If the site is in general niches (homepage not targetting any specific niche only posts target the niches) what should you write about when making manual web2.0 to link to your website? I mean your website is about all kinds of info, health,lifestyle,tecnologies, etc..

You can create a News site, or create a niche specific Web 2.0's and only link it to pages on your site that are relevant to that niche.

I usually create a niche-specific 2.0. For instance, my niche 2.0 may be about coffee or healthy foods and a link from my 2.0 will link to my site that mentions the benefits of your healthy morning eating routine that mentions coffee.

I would personally try boosting your inner page posts and let the internal link juice flow to the homepage instead.