Google is getting very heavy-handed with bloggers now. If you have too many links in your posts, not only might your blog be labelled as 'unworthy' but the blogs or sites that you link to may also suffer.
If you are focusing a blog post on the content of a specific website, e.g. one that has a catalogue of items that you like, you may be linking to several pages. Here is a tip:when you create the links from your blog post, remember to tick the rel=nofollow box for most of them. Here's how to do it in Blogger:
For WordPress blogs, you will need to know HTML or use a free plug-in.