Wikipedia on linking to blogs and unworthy self-links

Wikipedia:External links

Links normally to be avoided

11. Links to blogs and personal webpages, except those written by a recognized authority.

Advertising and conflicts of interest

Due to the rising profile of Wikipedia and the amount of extra traffic it can bring a site, there is a great temptation to use Wikipedia to advertise or promote links. This includes both commercial and non-commercial sites. You should avoid linking to a website that you own, maintain or represent, even if the guidelines otherwise imply that it should be linked.