The General Handbook of the Church contains instructions and videos on how to perform various ordinances in Section 18. Here is a link for your reference:
For your convenience, we have copied some ordinances that you may more commonly perform and have inserted the sections from the Handbook below.
To give a blessing of comfort and counsel or a father’s blessing, one or more Melchizedek Priesthood holders place their hands lightly on the person’s head. Then the one acting as voice:
Calls the person by his or her full name.
States that the blessing is being performed by the authority of the Melchizedek Priesthood.
Gives words of blessing, comfort, and counsel as guided by the Spirit.
Closes in the name of Jesus Christ.
Administering to the sick has two parts: anointing with oil and sealing the anointing.
Anointing with oil is done by one Melchizedek Priesthood holder. He:
Puts a drop of consecrated oil on the person’s head.
Places his hands lightly on the person’s head and calls the person by his or her full name.
States that he is acting by the authority of the Melchizedek Priesthood.
States that he is anointing with oil that has been consecrated for anointing and blessing the sick and afflicted.
Closes in the name of Jesus Christ.
To seal the anointing, one or more Melchizedek Priesthood holders place their hands lightly on the person’s head. Then the one who seals the anointing:
Calls the person by his or her full name.
States that he is sealing the anointing by the authority of the Melchizedek Priesthood.
Gives words of blessing as guided by the Spirit.
Closes in the name of Jesus Christ.
To consecrate the oil, a Melchizedek Priesthood holder:
Holds an open container of olive oil.
Addresses Heavenly Father as in prayer.
States that he is acting by the authority of the Melchizedek Priesthood.
Consecrates the oil (not the container) and sets it apart for anointing and blessing the sick and afflicted.
Closes in the name of Jesus Christ.
To dedicate a home, a Melchizedek Priesthood holder:
Addresses Heavenly Father as in prayer.
States that he is acting by the authority of the Melchizedek Priesthood.
Dedicates the home as a sacred place where the Holy Spirit can reside and gives other words as guided by the Spirit. For example, he might bless the home to be a place where family members can worship, find safety from the world, grow spiritually, and prepare for eternal family relationships.
Closes in the name of Jesus Christ.