Pray 12 Sunnah prayers & Allah will build a palace in Jannah for you.

 Pray 2 rak’ahs before fajr, 4 (2+2) before Dhurh & 2 after, 2 rak’ahs after Maghrib and 2 rak’ahs after Ish’a.
(at-Tirmidhi 379)