You can't share sensitive info over IM or email. These methods are not secure as anyone with little knowledge can intercept this information during transmission. Using 1ty.me as the "middle man" you can safely and securely transfer this data to your recipient. Visit our about or FAQ page for more info.
I like knowing that the link has been clicked. It only takes a few moments to enter your note, generate a link, and send it off to whomever you want to view it. It can only be viewed once, and then anyone who clicks the link will see the message "This message has already been viewed." I use this to share passwords, credit card info, and other private info I don't want sitting in an email or accidentally shared from an instant message.
Pros:Easy, fast, doesn't require an account. You only enter your email if you want to be notified if the link is clicked.
Cons:None I've found so far.