A couple months ago, I was writing a balloon-tutorial system for an app with a desktop and mobile version. The desktop version had to have commands like "click this, then click that". The mobile version, "touch this, then touch that." Often, the text was otherwise identical.
But what do we write when the user could be using either, for example on Windows 8? "Clicking" a link with your finger sounds strange -- there's nothing clicking. And "touching" something with your mouse seems equally strange, almost as if it implied moving the mouse but not clicking. "Press" works for buttons, but not menu items or links. "Activate" just seems weird. And writing out "touch/click" is just unwieldy.
What to do?