Business presentation skills are a must have. Things such as sarcasm may not come across as sarcasm through a textual medium, leading to problems and confusion. In text this is not as important because texts tend to be, by their very nature, informal affairs. The issue is that when speaking in email, it is often business or other important things being conducted. Here it is very important to get across the exact point that you are trying to convey in an effort to communicate properly. Whether over the phone or over some sort of textual media, top business presentation skills are surely a must have. They must be adapted to the specific medium through which they are being used or the entire thing is likely to come crashing down because of a failure to communicate. Telephone and email, specifically, place these skills at a level of importance that is greater than it would be if the medium involved was text. No matter what the social interaction, good business presentation skills are a top must have in today's world.