It is narrated from Ibn Umar that the Prophet Muhammad (Blessings of Allah and Peace be upon him) said: "There aren't any days greater, nor any days in which deeds done in them are more beloved to Allah, the Most High, than these ten days (of Dhul-Hijja). So, increase in them the saying of Tahleel (La Ilaaha illa Allah), and Takbeer (Allahu Akbar) and Tahmeed (al-Hamdu lillah)" [Musnad Imaam Ahmad] The Types of Deeds in These Ten Days: 1. The performance of Hajj and Umrah, and these are the best of deeds that may be done. 2. Fasting during these days - as many of them as may be easy (for one to fast); especially the Day of Arafah. 3. At-Takbeer (Allah Akbar) and adh-Dhikr (the remembrance of Allah through different words of praise and glorification) in these (ten) days. 4. At-Tawbah (repentance) and abstaining from disobedience and all types of sins. Disobedience is the cause of being far away (from Allah, the Most High) and repulsion, while obedience is the cause of being near (to Allah, Most High) and His love. 5. Doing plenty of voluntary (nafl) righteous deeds of worship like Prayer, Charity, Jihad, reading the Quran, Commanding what is Good and Forbidding what is Evil, and other such deeds. Compiled From: "Superior Days for Righteous Deeds" - Abdullah Ibn Abdur-Rahman al-Jibreen