Watermarks (xwatermark.sty)
\documentclass[a4paper]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{xcolor}
\usepackage{xwatermark}
\usepackage{lipsum}
\begin{document}
\newwatermark[allpages,textalign=center,fontfamily=pbk,angle=55,scale=2.75,xpos=-1cm,ypos=1cm]{SAMPLE WATERMARK}
\lipsum[1-55]
\end{document}
Download sample-xwatermark.tex or sample-xwatermark.pdf.