Don't trust your eyes - The most important reason to calibrate any display is to achieve consistency between the source of the content and the device used to display the content. This article describes how to calibrate a monitor.
Generally Epson and Canon have been known to manufacture the best consumer grade scanners. It is important that the scanner have a CCD sensor and not a cheap CIS sensor. 1200dpi, 36 or 48-bit and the larger the flatbed the better; also the more expensive.
It's best to have the default Windows application do the scanning. Third party software can add effects (eg descreen) which can negatively impact the image.
To scan, press the scan button on the scanner. In Windows this will save the image in the default Images folder. An unedited scanned image is sometimes referred to as a raw or raw image.
See this wiki page for more information on how to backup files.
This wiki page covers how to edit black and white line
art in Photoshop.