How many years have you been able easily to say a word without effort, or to form any sentence you wanted to? Without a doubt, you will answer, "It has been many years." However, it probably will not have occurred to most people to ask themselves such a question, because speech is a faculty most of us are born with, and therefore, often merely taken for granted.
Most are able to speak as much or as little as they want, thanks to this God-given ability, and, it would seem, in general, people have become so accustomed to it that they fail to take into account the importance of speech.
Rather, it is of an importance that everyone should recognize; that is, that being able to speak is a blessing, and that Allah granted such an ability for a specific purpose. On the Day of Judgment everyone will be held responsible for every word they have uttered.
Wanna sharing this information which i red from web of Harun Yahya... It is 85 pages articles, and i just finished up to page 17 (20%) and for now only able to paste 5 points here. (you can click Harun Yahya, to continue reading)
"Dan tidak ada yang lebih baik perkataannya daripada orang yang menyeru kepada Allah dan beramal salih, sambil berkata: Sesungguhnya aku dari orang Islam"
(Surah al-Fussilat; ayat 33)
1. Praising the Might of Allah
Those who remember Allah, standing, sitting and lying on their sides, and reflect on the creation of the heavens and the earth [saying]:
"Our Lord, You have not created this for nothing. Glory be to You! So safeguard us from the punishment of the Fire." (Surah Al ‘Imran: 191)
And say: "Praise be to Allah Who has had no son and Who has no partner in His Kingdom and Who needs no one to protect Him from weakness." And proclaim His Greatness repeatedly! (Surat al-Isra': 111)
2. Remembering Allah frequently
"Recite what has been revealed to you of the Book and perform prayer. Prayer precludes indecency and wrongdoing. And remembrance of Allah is greater still. Allah knows what you do." (Surat al-‘Ankabut: 45),
[Believers are] not distracted by trade or commerce from the remembrance of Allah and the establishment of prayer and the giving of alms; fearing a day when all hearts and eyes will be in turmoil. (Surat an-Nur: 37)
Those who believe and whose hearts find peace in the remembrance of Allah. Only in the remembrance of Allah can the heart find peace. (Surat ar-Ra‘d: 28)
You who have believe! When you encounter a company [from the enemy forces], stand firm and remember Allah repeatedly so that hopefully you will be successful. (Surat al-Anfal: 45)
3. Calling on Allah through His Beautiful Names
With the following verse of the Qur'an, "Say: 'Call on Allah or call on the All-Merciful, whichever you call upon, the Most Beautiful Names are His.'" (Surat al-Isra': 110), Allah reminds us that He possesses the most beautiful of names, and advises believers to call upon Him by them.
As is pointed out by Allah in the verse, "They will not be wronged by so much as the smallest speck." (Surat an-Nisa': 49), they speak with knowledge that humans will not be made to suffer the slightest injustice.
And when Allah says, ''Isa son of Maryam! Did you say to people, 'Take me and my mother as gods besides Allah?'" he will say, "Glory be to You! It is not for me to say what I have no right to say! If I had said it, then You would have known it. You know what is in my self but I do not know what is in Your Self. You are the Knower of all unseen things." (Surat al-Ma'ida: 116)
4. Speaking in the knowledge that Allah is with you at every moment
You do not engage in any matter or recite any of the Qur'an or do any action without Our witnessing you while you are occupied with it. Not even the smallest speck eludes your Lord, either on earth or in heaven. Nor is there anything smaller than that, or larger, which is not in a Clear Book. (Surah Yunus: 61)
5. Speaking so as not to associate others with Allah
In this verse of the Qur'an, "Your Allah is One Allah. There is no god but Him, the All-Merciful, the Most Merciful" (Surat al-Baqara: 163), Allah informs us that there is no Creator other than Him and no other power to intervene for good or ill. Allah is the One, and there is no power other than Him Who can guide human beings to the truth, protect them and give them peace and blessings.
However, a segment of humanity is unaware of this truth. Some, when asked, say that there is no god but Allah, and that they believe He is omnipotent, but, because in their hearts they do not believe it to the full, hope for aid instead from other people, or from a change in circumstances, or even such mythical powers as luck or chance. However, neither human nor any other creation exercises any such power. As we are told in the Qur'an,
... All might belongs to Allah... (Surah Yunus: 65)
Believers, on the other hand, are cognizant that there is no god but Allah that all glory and power is His, a truth which they sense devoutly and at every moment of their lives. They hope for help from none other than Allah, not from any other person or event. They trust Allah and rely on Him solely. They fear only Allah, and expect help only from Him, because no person or living creature can possess the attributes of Allah; they are all creatures in need of Him, who have no power to ensure any good for themselves or to protect themselves from evil. The Qur'an explains the matter with the following example:
The call of truth is made to Him alone. Those they call upon apart from Him do not respond to them at all. It is like someone stretching out his cupped hands towards water to convey it to his mouth: it will never get there. The call of the unbelievers only goes astray. (Surat ar-Ra‘d: 14)