Undoubtedly, the heart leans towards those who are kind and gentle. It was said a long time ago: "Make your face happy and your words gentle, and you will be more beloved to the people than those who give them a gift". The one calling to the religion of Islam and dealing with other people has the utmost need to gather the people around him, and cause their hearts to lean towards him so that they will listen to him. Adorning himself with kindness and gentleness helps to achieve that goal with the grace of Allah.
People of Sunnah, be kind with one another
Author: Abdul-Muhsin Bin Hamad Al-Abbad Al-Badir
Translators: Tarik Preston
Ibn Rajab al-Hanbali This is a treatise we have written concerning humility (Khushu') and the hearts meekness and breaking (inkisar) before the Lord. The basic meaning of Khushu', is the softness of the heart, its being gentle, still, submissive, broken, and yearning. When the heart is humble, so too is the hearing, seeing, heard, and face; indeed all the limbs and their actions are humbled, even speech. The source of the Khushu, that takes place in the heart is the gnosis of Allah's greatness, magnificence, and perfection.
Author: Ibn Rajab Al-Hanbali
3 Treatises concerning Tobacco by the great scholars: Muhammmad bin Ibraaheem, as-Sadi, and bin Baaz
Author: Abdul Aziz bin Abdullah bin Baz - Abdur-Rahman Bin Nasir as-Sadi - Muhammad bin Ibraaheem Aal-ish-Sheikh
Source: http://www.islamhouse.com/p/1235
A brief but nice booklet discussing Zakaah, those items and amounts upon which it is due, and where it is to be spent. Includes a few important fataawa related to Zakaah
Author: Abdul Aziz bin Abdullah bin Baz
Source: http://www.islamhouse.com/p/1269
A nice discussion of some important points needed by those callling to Islam
Source: http://www.islamhouse.com/p/1243