Simply fill in the details down this page and write your suggestions at the bottom; when you've done, press the button marked "Submit" to send the page off to ArgoNet HQ, or press "Reset" to wipe the page clean and start again. If you don't want to fill out the whole form just put what you feel is relevant, or mail us at Suggestions@ArgoNet.Co.UK.
If you are reporting a fault rather than making a suggestion, use the bug reporting form instead.