I want to grow my hair long, but how should i grow it, which would mean its manageable and would look good at the same time. As mentioned before my hair has become thin, so take this into consideration.

Well if its thin, you should not grow it too long, as it would look limp.

To grow your hair long, you must first think and imagine your self with long hairs, sometimes long hairs doesn't look good for some people, so you must take care to be safe with you decision to grow long hair. Secondly, if you wish to grow, cut the tips of the hair frequently like monthly once.

It takes much time to grow your hair, when it grows slowly. You will know when it will be hard to maintain. stop growing it beyond that point.

The first length that comes to mind is about mid back. I think this is long, but not too long. However, remember every few months to have the split ends trimmed off, this way, it will look a lot neater as it grows out and it will actually help your hair grow a lot faster too