I use the templates below to create worksheets, documents, and the such quickly and consistently.

beamer.tex

Beamer slides template.

beamerthemeconfposter.sty

Style file for beamer poster file.

html.html

Simple HTML template.

LaTeX-APA-Document.tex

LaTeX file for doing an APA document.

latex-book.tex

LaTeX file for making a book.

markdown

A simple Markdown file, including examples of most of the commonly used markup.

ODT_Booklet.odt

File for making a booklet in LibreOffice.

ODT_Document.odt

Simple ODT (OpenDocument Text Format) file. Similar to a blank MS Word docx file.

ODT_MLA_Document.odt

OpenDocument file for doing MLA documents.

ODT_Worksheet.odt

OpenDocument file for making a worksheet. Has place for name, date, points, directions, etc.

pdf-add-page-numbers.tex

LaTeX file for adding page numbers to PDF files. Great for when you put several PDFs into one file. I use it all the time when I make booklets.

poster.tex

I found this somewhere (link coming soon). Great LaTeX file for making a poster. Needs the 'beamerthemeconfposter.sty' file (above).

SLA_Document_Landscape.sla

SLA is the Scribus desktop publishing file format. This is a template for a simple letter paper size landscape Scribus document.

SLA_Document_Portrait.sla

SLA is the Scribus desktop publishing file format. This is a template for a simple letter paper size portrait orientation Scribus document.

SVG_DVD_TV_Frame.svg

SVG is the "Scalable Vector Graphic" format. SVG is great because you can scale it to pretty much any size. This template is sized to work for adding to DVD-sized videos.

SVG_Letter_Landscape.svg

SVG ("scalable vector graphics") file for letter paper size landscape document.

SVG_Letter_Portrait.svg

SVG ("scalable vector graphics") file for letter paper size portrait-orientation document.

SVG_VP_Poster_Medium_Landscape.svg

SVG ("scalable vector graphics") file for VistaPrint medium poster size landscape document.

SVG_VP_Poster_Medium_Portrait.svg

SVG ("scalable vector graphics") file for VistaPrint medium poster size portrait-orientation document.