1. In the last third hour of the night
2. During sujood (Prostration) in prostration, believers are closest to their maker.
3. Between the adhan(call to prayer) and iqmah (starting prayer)
4. At the end of every obligatory prayer (Salah)
5.When its raining
6. During a journey/travelling
7. During the breaking of Sawm(Fasting) this is not only applicable during month of ramadhan but during sunnah fasting of monday's and thursday's
8. After sending blessings to the blessed Prophet SAW - " Allahumma salli'ala Muhammad..."
9.During Arafat (This performed during the Hajj time. every believer alive during that time make their dua(Prayer) at that period.
10.When visiting a sick person

This is my little contribution... jumaat kareem!