Once you've opened your image and renamed it you need to create a new adjustment layer. Go to Layer>New Adjustment Layer>Channel Mixer. Or click on the black and white circle found at the bottom of the layers palette and select channel mixer.
Step 2: Channel mixer changes
In the channel mixer tick the monochrome box and play with the red, green and blur values to change the tone. Make sure the figures you pick add up to 100%. We changed our values to 70% red, 1% green and 28% blue. By playing around with the figures you may see elements of the image you didn't notice when in colour. It's as easy as that!
You've read the article, now go take some fantastic images. You can then upload the pictures, plus any advice and suggestions you have into the dedicated Photo Month forum for everyone at ePHOTOzine to enjoy.