(its never too late to start)
وَالْفَجْرِ .وَلَيَالٍ عَشْرٍ
“By the ten nights.” [Al- Fajr, v:2]
The “ten nights” which Allaah subhaana wa ta3alaa is swearing by here, are the first 10 days of Dhul-Hijjah.  Allaah [subhaanahu wa ta3alaa] swears an oath by them, and swearing an oath by something is indicative of its importance and great benefit.
Ibn 3Abbas radi Allaahu 3anhu narrated that Prophet sall-Allaahu 3Alayhi wa sallam said: “There are no days in which righteous deeds are more beloved to Allaah than these ten days”.
He was asked: “Not even jihaad for the sake of Allaah?” He said: “Not even jihaad for the sake of Allaah, except in the case of a man who went out to fight giving himself and his wealth up for the cause, and came back with nothing.” 
So, my sisters [and brothers] take note of the following:
Have the intention to spread this important information.
It is a great chance to collect uncountable hasanaat [rewards].
It is a great chance to renew your relation with Allaah [subhaana wa ta’alaa].
Prepare now so you can start from the first night/day of the month [i.e. as soon as Dhul-Hijjah is announced]. You don’t want to miss a moment of the best days in the sight of Allaah [subhaana wa ta3alaa].
Since the Prophet sall-Allaahu 3Alayhi wa sallam referred to the 10 days of Dhul-Hijjah as: “…no days better than these days in the sight of Allaah.” , the scholars have said that these are better than Ramadan. 
Therefore, be very vigilant and don’t waste these precious moments. Ask Allaah to help you to benefit from this period of His special Grace.
Ask yourself these questions [non-rhetorical]:
Did you intend to benefit from these days?
What have you done to prepare for these 10 days?
Did you prepare a program?
What is your plan of action?
Here is a brief guide to help you to prepare for the best days of the year
Making The Most Of The Blessed Days Of Dhul-Hijjah (right click & download)
(Excellent Read!!)by Umm 3Abdur-Rahmaan Transcribed from a lecture by Shaykh Muhammad Hussain Ya3qoob, “how to benefit from Blessed day of Dhul-Hijjah”.