First post on this site, but you have to start someplace. My current work involves a lot of blog content development. I primarily write for businesses I am a part of (martial arts, fitness, education, etc.) but there are a few conventions I think all bloggers should follow:
1. Be consistent: Set a schedule for content and stick to it. I see the opposite almost everyday. First blog post is June 24th, then the next is in August of September. Before you launch write no less than 12 posts and schedule them out. If you cannot commit to posting regularly, you will not get a lot of traction. It doesn't have to be every week, but keep it the same time when you do it. For example, I write a blog on martial arts that I post original content on every Friday. Another site I help with we post every other week on Wednesday. If you build a following they will expect and look forward to your content. If you randomly post people will get annoyed.
2. If your finances will allow it host the blog on a dedicated URL. It is easier to remember www.nrhuwald.com than it is to remember www.nrhuwald.blogspot.com
3. Don't go crazy of design. Too much is too much. Keep the layout simple. If you become successful then invest some money in producing a custom site, but until then a clear layout is best.
4. Make sure it looks good on your phone. Almost every template site or blog is mobile enabled, but just make sure. I still run into sites where I pull them up and I have to scroll forever to get past the navigation menu.
I hope this helps.