The conclusion should consist of a simple major statement, with not more than two or three connotations, if these are absolutely essential. The conclusion should very clearly demarcate the end of the lecture. The most important rule for a scientific presentation is to finish on time and on a clear and resonant note. Complex data delivered during a seminar cannot be fully appreciated unless the speaker separates them into a series of simplified constituents. Try to to avoid showing tables.
Some general rules Lettering on viewgraphs and slides can never be too big.
Uniformity of style throughout the presentation accentuates and underscores the flow and coherence of the talk. Rules for figures Graphs should contain clearly labelled axes. The less busy a figure appears, the more justice it does to the information it attempts to communicate. Delete all information from the figures that is irrelevant to the presentation. A figure can be enhanced by a line or two concisely describing the conclusions to be drawn from the figure.