To further increase the chances of a Dua being Mustajab, the following etiquettes are recommended:
"There is an hour on Friday during which, if a Muslim asks Allah for something good, He will give it to him." (Sahih Bukhari) dua mustajab
Friday is the best day of the week. There is a specific "golden hour" on this day, often interpreted as the last hour before Maghrib prayer, where prayers are granted. To further increase the chances of a Dua