1) Keep your blog posts relatively short. A few hundred words maximum in general. Most blog readers expect and want concise posts. Sure, you may have the occasional real long post, but in general they should be fairly short.
2) Longer writings can be broken up into multiple parts and form a blog series. Readers tend to like those. If they read the first part they will come back and read the second part and the third part and so forth.
Also something to keep in mind is on the Internet people don’t read, they scan. Short blog posts are far easier to scan and get the meaning of and get value from than long blog posts.
3) Writing great post titles is important. Post titles are essentially headlines and hopefully they entice people to read further. For example, “How To” headlines and list such as “Five Ways To whatever” often work really well. Copyblogger.com’s Brian Clark has some particularly good advice on writing post titles, i.e. headlines. You can learn a lot by reading what Copyblogger has written as well as by studying his.
4) You should spell-check and proofread your posts before publishing. Taking a few seconds will catch most errors. You still might very occasionally have some grammatical errors or other errors and that’s ok.
5) Always site your sources and link to them. For example, if you are blogging on something you found out about due to someone else’s post, give them credit. Reasons to do this include honesty and that it makes your blog more valuable to your readers. If you found that blog valuable and got ideas, maybe your readers will as well. Also the sources you link to will frequently discover your blog and they may become readers or they may link to you in return at some point.
6) Always think before you hit publish. Almost the whole world will be able to see what you have written. As I often mentioned, “Hey, the Internet is a very public place.”
If you are angry, if you are upset, use the same rules that you should use with email. Wait at least overnight.
7) Don’t try to make your writing perfect, writing is never perfect.
An occasional typo or other error may be get through and it’s not a problem, although certainly you don’t want too many errors because that looks unprofessional. Also remember you are writing a blog post; it’s not a research paper. You are putting ideas out there. You are extending the conversation. Realize your posts aren’t going to be perfect. Writing never ever is.
That said, sometimes I will save blog posts that don’t seem quite right and work on them later. Although many posts may be written and published in just a few minutes, some may require more time for contemplation. Some posts may require you sleep on them, wait until the next morning, before you can do them justice. Sometimes I won’t be sure whether to hit publish. It just doesn’t seem quite right, but I am not sure why. I can tell you sometimes I publish these post anyway and they have been some of my more popular posts.