Are you frustrated with your root directory, because it contains all sorts of files that end with the extension .MAI or a prefaced by DECW$? Check out this VMS tip to help reduce the clutter.

Just about all process under your username, executes your LOGIN.COM file, even most windows created on your workstation. Putting in the proper logic in your LOGIN.COM file can significantly speed up your sessions.

One of the most common DCL faux pas is overuse of quotes. Specifically the use of single quotes for symbol substitution inside double quoted character strings. Come read the page on proper quoting, but please don't quote me!