When pouring bubbly, whether it's for drinking or toasting, there is a clear and scientifically tested method to follow.
Pop the cork, and let the wine breathe and open in flavour.
Hold the bottle from the base, not the neck.
Pour from an angle, not straight down. This is done by tilting the glass (like you would to pour a beer), and allowing the alcohol (and bubbles – which contain much of the flavour) to gently slide into the glass.
When pouring, keep the flow slow and consistent. If bubbles are collecting around the sides and settling, you’re onto a winner.