I try and keep up on quite a many blogs every day. Unfortunately I don't have all the time in world to do so and sometimes I resort to plain skimming. Unless the post seems extraordinarily interesting. I am a quite fast reader, but sometimes blogs are designed and blog posts constructed so that reading them is slow and feels like way too much of work.
Find your true voice and flow
Other people have their ways to write. And some of them like to think writing in a certain way is the only right way. I do think everyone has their own style and even if it's not perfect and the grammar correct, it's true and genuine.
Reading a text that seems overall forced is sad and unpleasant. Writing the way that feels natural for you makes the text more natural to read.
Use short paragraphs and sentences
I do it myself: Use too long paragraphs and sentences that seem to go on and on and on and... Yeah, here we go again. Long sentences are just plain difficult to read. At the point when the sentence has reached it's end the beginning has already faded from the readers memory. Besides long sentences can make the writer look stupid and ranty.
Shorter paragraphs aren't just better for skimming. They are also easier to read. On mobile long paragraphs look even worse.
In order to make your blog more readable, learn to cut your text in as short paragraphs as you can. One sentence is not usually a paragraph, but two or three can make one.
Keep it short in general
Some subjects require more words, more sentences and more paragraphs. Being able to write the same thing in fewer words, sentences and paragraphs is admirable. I can't say I'm good in it myself, but I see loads of bloggers falling into the pit of writing life long texts each and every time.
The one post doesn't have to contain all the information. Shorting the post doesn't have to mean leaving good info out. For instance try and write a series of shorter posts around one subject.
Bold it, emphasize it, but don't go crazy with it
Using bold and emphasizing is good in time to time. It gives those who skim something to catch onto and breaks the monotony of a regular post. Just don't go over the board with it. Too much is way too much.
If it has to be a long post or there's different main points in it (like this one), breaking the text in chunks with subheaders is more than recommended. Subheaders are good for skimmers too, as well as they make the text easier to manage for anyone's brains.
My Finnish language teachers have always told me there must be more than one (and preferably more than two) paragraph after a header. Online this rule isn't that strict, since the texts can be and often are better and more readable if they are short. Again, moderation is due. Too many subheadings make text as impossible to read as too little.