The first 10 days of Dhul Hijjah are the best days of the entire year, according the authentic ahadith!
During these 10 days, make sure and spend lots of time in worshiping Allah, especially do lots of adhkaar:
Tasbeeh (Subhan Allah), Tahmid (Alhumdulillah), Taleel (Laa ilaaha Illa Allah), Takbeer (Allahu Akbar)