Bullet points tend to look visually cleanest in a list formatted blog. These can be used for full sentences, or phrases. The use of a punctuation is optional as it depends on how the content is being presented but it's best to stay consistent throughout a single particular blog.
Numerical lists are best reserved for content that needs to be presented in a specific sequential order such as a recipe or 'top rated' list.
Dashes are often used in place of bullet points for a visual variance. Regardless of how and where you use them make sure to be consistent. Try not to use both dashes and bullet points in the same blog for the same purpose.
