You can combine all three aspects in one dua.
- It's good to start your dua with the praise and glorification of Allah swt and sending blessings on the prophet Muhammad and his holy family.
- Then Ask Allah for forgiveness for your fellow believers and yourself.
- Then it's good to pray for your brothers and sisters in faith for everything they need or want (Everything which is good and halal).
- At the end of your dua you should ask for yourself, doesn't matter whether your wish is big or small.
- Finish your dua by sending once again blessings on the prophet Muhammad and his holy family and the last should be: By Your Mercy,oh the Most merciful of the Merciful.
Allah swt loves to hear your voice especially in the night when everybody is at sleep. Try to be in a state between fear and hope. Fear of His punishment and hope for His mercy.
The Prophet (s)said: Supplication (dua) is the weapon of the believer, the pillar of religion, and the light of the heavens and the earth. [al-Kafi, v.2, p.468,no.1]
Never lose hope in your dua and keep on doing it!!!!!!