Extra white space across the page, because business and technical writing is usually single-spaced, makes documents easier on the eyes. Vertical white space surrounds lists like the one above and highlights items that would otherwise be lost in paragraph form. Use headings, horizontal white space, and vertical white space in your letters. Headings should correspond with the various professional subjects you choose to tell me about. Extra white space may be used to separate major sections.
Some care needs to be taken with the style of heads and lists.
They need to be consistent and parallel. If, for example, you choose to use bold and all caps for your maajor heads, then all your major heads need to be bold and all caps. That is consistency. Parallelism is the similarity of grammatical structure among heads or items in a list. Parallelism need not be absolutely exact.