I seem to be having a 'senior' moment - help

[stlewis]

Here is a comparison of the three techniques mentioned plus another using Live Effects (the least satisfactory!)

[angelize]

I often have to do this for our little publication. My technique is as Mike (Graphicsfactory) suggested using the photo tool desaturation, but I also make adjustments with the brightness and levels dialogue.

[ShapeShifter]

You could always just choose 'Make black and white' from the context menu selection?