“Have a link to your email signup list spelled out in the signature line that you attach to every email that you send out. This eliminates the need for someone to ask you for it and may pick up a few extra email list subscribers along the way.”
Create an engaging signup signature for the end of every email you send. This creates a lot less confusion and instantly provides potential customers with a way to add their names to your list. Make it funny it if pertains to your business!