Pour the rimming salt onto a small, shallow dish that's wider than the glasses you're using. 2. Slice a lime into wedges and cut a small slice partially through the flesh. 3. Run the lime slice all around the rim of the glass, transferring a bit of juice onto the inner and outer parts of the glass. 4. Flip the glass upside down and press it gently into the salt. Flip it back right side up.