"Now to each one the manifestation of the Spirit is given for the common good." NIV translation
These gifts are simply a result of the Holy Spirit being present in the life of a believer. The gifts are to be used for the good of the church but, in many cases, they are used like some sort of circus sideshow. In using these gifts for the common good, the church is unified as each believer is of value to the church as a whole.
"To one there is given through the Spirit the message of wisdom, to another the message of knowledge by means of the same Spirit," NIV translation
Now, Paul begins to list different ways that the Holy Spirit is displayed in the lives of Christians.
We see both wisdom and knowledge and they are both only available through the Spirit. Knowledge is understanding the things of God while wisdom is being able to apply them to practical living.
"to another faith by the same Spirit, to another gifts of healing by that one Spirit," NIV translation
Paul continues his list and we may ask about faith being on the list. While all Christians must have a measure of faith in Jesus Christ for salvation, have you ever seen someone who it seems is stronger in their faith? There are some who have been given this measure where they simply just know what they know and will not be shaken or moved from it. There also those that can heal with a physical touch or through prayer. Once again, we see that they are both from the Holy Spirit.
"to another miraculous powers, to another prophecy, to another distinguishing between spirits, to another speaking in different kinds of tongues, and to still another the interpretation of tongues." NIV translation
In this part of the list we see prophecy and tongues and sometimes they are confused. Prophecy is simply a person sharing a message from God with a person or persons. The message may be about things that are happening or going to happen.
Speaking in tongues has become one of the most misunderstood methods of displaying the Holy Spirit. There are those that go so far as to tell others that they are not Christians if they do not speak in tongues. To clear this up we must understand what we are talking about. Speaking in tongues is where a person speaks to God (prays) in what seems to be their own language. As we see in the list, the ability to understand these languages is another way that the Spirit is displayed.