Always do your best about caring your nails, skin and more. This is kind of self respect. You do not have to have best brands to do that. Soup water and some basic staff will be able to do that. Yes have a nice shape on your nails even you do not paint them. 

You will be able to read tips for both for woman and man. All these tips are subjective and not an objective. The living conditions you have and your network or lifestyle may not be a suitable to follow the tips listed here and also you may fail by following them! It would be better to comprehend what it is saying here and decide on your own whether to follow or not to follow it. It is not definite that this will be good for you. It may harm you too. Last decision is always your decision.