How do you all go about converting special characters such as '&' and '' etc into their HTML entities; & and £ etc?

I code in Coda, and regularly copy and paste blocks of text that clients have provided me from Word or an e-mail into the HTML, I then have to go through it and manually change each occurrence of a & or into it's special character. I know find and replace is an option, but surely there is some kind of way that automatically converts the characters upon copying the text?

How do all you's go about doing this?

Many Thanks
James