If I'm using my iPhone, it's not as easy. If that website uses AddThis, no problem, I can use the handy iphone-optimized sharing menu. But if that site doesn't use AddThis yet, I have to use Safari's email-link feature. Not optimal.
- Bookmark this page (or any page you like); save the bookmark wherever you'd like your bookmarklet to be.
- Open the bookmark menu on your iPhone (it's on the bottom menu in Safari, the icon that looks like an open book), navigate to the bookmark you just created, and edit it.
- Change the name of the bookmark to "Share", or whatever you'd like to call it.
Big hat tip to my partner in crime Jeff Wong for this tip.