How to incorporate figures into my LaTeX file?
\usepackage{psfig} will undoubtly prove useful or the more modern approach is to use the package graphicx (read grfguide.ps). For further documentation on how to incorporate graphic elements read epslatex.ps. Note for those used to LaTeX 2.09 and older teTeX distributions: \input psfig will not work in conjunction with the use of nfssfontcompat, the solution is to replace \input psfig with % \input psfig or simply delete the line. Also comment out all lines containing nsfontcompat or simply delete mention of nfssfontcompat. In particular lines which have \documentstyle[nfssfontcompat,…] should be replace with \documentstyle[…]. Ideally you should be using the modern latex2e construct \documentclass rather than \documentstyle and to include styles use \usepackage{name} to load in name.sty.