What Antonia said works but any stainless steel surface will work the same. I prefer to use the side of my stainless steel sink.

Garlic smell on my fingers is one of my favorite things in the world.

Old fashioned (Morton) table salt works well, too.

I use lemon and rub them on my fingers ...

The back (dull side) of a stainless steel knife blade also works! I typically rinse my chef's knife immediately after chopping garlic, to get the sticky stuff off, and make a point of rubbing my fingertips carefully over the broad sides of the blade at the same time. Works like a charm . . . . ;o)

If you have a stainless steel sink, just rub your fingertips over it. You can also buy a stainless thing that looks like a bar of soap - kitchenware stores generally have them.