Vow

Do you know the meaning of vow? We, God creatures remember him when we are in big troubles. But there is a good way of this reminding for me, whenever I face a serious problem I vow to do some good jobs(like donating money or helping abject people) in order to thank him for not forgetting us again. It brings me calm and satisfaction.
These days Mehrdad and I have some bad problems, they should be solve otherwise Idon't know what will happen but I'm sure again our vows will work and we together will come over them. Our demands from God are always so abruptly but he will answer them in the right moment. Maybe we should wait for that moment...