Every blog is different, but try to follow these general guidelines:
A short, attention grabbing title
This is incredibly important for getting those people onto your blog initially. If the headline is catchy, people will want to read on.
First impressions are very important. Capture your reader from the beginning with a good opening line and a brief intro paragraph on what the blog is about.
The main content of the blog
Use formatting to get a clear layout - sections, titles, punctuation and paragraphs, spoilers, horizontal rules etc. Also think carefully about your content - something that is interesting/different will be much more popular.
A brief outro
Summarise the main points/conclusions you have written about.
Identify the aim and genre of your blog and make sure you include the right features:
Opinions/rants - Make a great argument that opens up debate and interacts with your readers. Include a counter-argument!
News - This is a Minecraft fansite, so ensure you provide useful and relevant information that is likely to interest your typical reader.
Entertaining - Make sure it is fun and interactive for the reader.
Educational/informational - Tutorials are great, but if the tutorial isn't USEFUL then you're missing the point. Concentrate on a uncommon or difficult topic that is likely to be useful to a broad audience.
Community - Give something PMC-community based that people can easily relate to.