Allah Ta'ala states: “And make Mashwara (consult) with them in affairs (of importance). Then when you have firmly decided, place your trust in Allah. Verily Allah loves those who have trust (in Him)." (Surah Aal Imran, Verse 159)
In another verse, Allah Ta'ala speaks about some of the qualities of true Muslims, inter alia, it is mentioned: "And their affairs are decided upon by Shura between them." (Surah As Shua'ra, Verse 38)
Hazrat Anas (Radiyallahu Anhu) narrates that Rasulullah (Salallahu alaihi wa Sallam) said: "He who resorts to Istikharah will not be at a loss, and he who resorts to Mashwara will never regret." (Majma-ul-Fawaa'id)
Many losses, regrets and blunders can be avoided if we consult with reputable, experienced and learned Ulama and other pious people and heed the advice given.