A person is in need of Allah to bring about what is good for her in both this life as well as the Hereafter. In addition, Allah's help is also needed concerning what occurs after one's death in this life, both in the grave and on the Day of Judgment.
This concept of asking Allah and seeking Allah's help does not mean that a person puts forth no effort on her own part. Instead, the person should use all of her God-given abilities to meet her goal. She should ask Allah to help her in using those abilities and then ask Allah and seek help in Allah for her needs that are beyond what she has the capability to perform. This is the correct approach as implied by the Messenger of Allah (peace be upon him) when he said,
"A strong believer is better and more beloved to Allah than a weak believer - however, there is good in every [believer]. Be eager for [and strive after] what benefits you and seek help in Allah. And do not be too weak or lazy to do so." [Muslim]

Compiled From:
"Commentary on the Forty Hadith of an-Nawawi" - Jamaal al-Din Zarabozo, pp 758, 759