Read Numbers 6:1-21 and you'll discover the requirements of a Nazirite vow.
What draws me to this vow is that it's a completely voluntary form of worship that incorporates both the mind and the body in an act of worship. Samson, in Judges 13, was decreed by the angel of the Lord to be a Nazirite from birth, but for the rest of Israel, this vow was a way of showing special devotion for a particular period of time.
The three major attributes of a Nazirite vow are:
1 - don't eat or drink anything that comes from the vine;