Template:D

Speedy deletion template is used for pages that do not require a full deletion process, such as old images or unneeded articles. This template also adds pages to Category:Speedy deletion candidates.

No reason given
When no reason is given (i.e. only the   tag is used), it makes it hard for admins to figure out why the article was marked for deletion. Thus, make sure the reason for "Speedy deletion" is given.