Picture of Simple Drilling Template
Pretty Simple, and cheap. The idea was to improve my accuracy when drilling holes on a material that didn't take pencil markings too well.  This may have been covered in an 'ible before- If it has I apologize. 
Things you'll need:
An Idea
Center Punch
Drill- or Drill Press

Step 1: Draw your template- to scale

Picture of Draw your template- to scale
If you need a larger template, than the paper will allow- draw it to a scale (later, use your printers "enlarge by x" option to enlarge your drawing) 
This is a simple template for a series of holes, on a plate.