Are you wanting to achieve success in something? If so, then this dua can be in your daily recitation. Be it a financial goal that you have planned or things related to other areas of your life, turning to Allah for all our needs is the way. This dua is easy to read, learn and memorise, so your best bet is to start dwelling on its meaning, reciting it and getting success you desire.
رَبِّ إِنِّي لِمَا أَنزَلْتَ إِلَيَّ مِنْ خَيْرٍ فَقِيرٌ
Rabbi inni lima anzalta ilayya min khayrin faqeer
Translation of dua for success: I am in absolute need of the good You send me.
This dua can be used in success of all things, all desires (halal ones only) but there are some do's and donts if you want to gain the maximum benefits of this dua.
Faith is the most important aspect of duas being accepted or rejected. Have complete faith in Allah and start already assuming hopefully that Allah has given you success in your aim/desire/goal or whatever wish you have made.
Start accepting your mistakes and sins and keep doing astaghfar because Allah usually blocks our lives due to our own mistakes. Do as much astaghfar as you can and success will be yours
Start thanking Allah for blessings He has given you. Allah says in Quran: "If you are thankful, I will give you more". Allah has told us a principal of increase. So, you must thank Allah for this Dua you are reading here on this website. Thank Allah for Quran, angels who brought verses to Prophet Mohammad Peace Be Upon Him. Thank Allah for Prophet Mohammad Peace Be Upon Him and His entire existence for being a source of guidance for us. Thank Allah for making you turn to Him for your desired success.