Summarize the following:
Toasting is a group activity, so be sure that everyone's wine glasses are filled, they are paying attention, and whomever is being toasted is present. Standing guarantees everyone can see you, and it helps your voice carry to the crowd. In smaller settings such as a single table, standing is optional. Often, this is done by saying, "I would like to propose a toast to..." Clinking cutlery against the side of the wine glass also grabs attention and sets the mood. Wait for your associates, dining partners or event attendees to recognize your intentions and to lift their glasses from the table if they are not already holding them.

Summary:
Ensure others are prepared for the toast. Stand up, if toasting in front of a large group. Call attention to the fact you intend to raise a toast.