1. Always hold your glass in your left hand, your right hand is for shaken.
2. Never rap on a glass to get attention. Too often the results are shattering.
3. Water is not suitable for a toast because it is bad luck according to superstition. It would be preferable to raise an empty glass.
4. Most importantly, always be sure to make eye contact with the guest you are toasting otherwise it is said you will have bad sex for seven years; Yes 7 years.