Bad headlines. They're frustrating. Some bloggers like to get creative... but creativity can affect search engine keyword opportunities. The important thing is that readers have a hint of what the post is about.
Readers like to know where links take them and most of us rely on the status bar, but sometimes that doesn't help. Some experts say to use "click here" to help those who are newer to the Web and others say that's wrong, wrong, wrong. It just depends on the content. When linking, try to pick the best words that give readers an idea of what to expect.
Calendars as the only way to navigate a blog and impossible to find archives or older entries are big problems. I almost always resort to search when I want to find postings no longer on the home page. Unfortunately, some blogs don't have search. That's why I put "archive" links in my sidebar in both