If you really want to achieve something, you need to give up pleasure, your current affairs, your plans and you need to be alone. When you do all these and you start to pray, then the energy which is normally expended on other things will make your efforts more effective.
Just to say a prayer ‘God, please forgive me. Give my children good health' might sound great but it is unlikely to have an effect.
In order to receive something, we need to give.