There are three basic parts to every Serve

[marvis]

1. Checking the rim of the goblet or plate for flaws serving from a nadu position (tower if serving a Mistress or still in training silks). Check the vessel visually first, then press the vessel to bare flesh to make sure there are no flaws to harm the One being served. Some of the places most used are.. belly, wrist, breast (over the heart)

2. Kissing the side of the goblet or plate

3. Everything else is really personal style. However, there are many things you can do to make your serve enticing.

[marvis]

The checking of the vessel using the flesh is not something that was done in the books. A clothe or sight was used to check for flaws. A slave was not allowed to do anything that would harm or scar the slave causing the slaves worth or value to decrease.
So when doing a serve check in the rules to see if there is anything in reference to the slave doing or not doing that. Just remember it's not in the books.

[marvis]

holds it to your heart for the count of 3 heartbeats...
1 for Love...
2 for Devotion...
3 for Obedience...