Continued...

So (therefore or another transition is better), it is vital to keep family members in harmony. lastly Finally, another important factor is the sense of achievement from a career. A person can feel himself valuable and respected by getting his work well done well. They These are the main reasons ways to achieve happiness.

But, the key to handle handling these factors well is self-controlling self control. (Strange structure, I would say: But, the key to achieving these factors is self-control. I am not sure what you meant by handling.)

Without abuse abusing of your body, the trust of your family, and or your working time. A person can get his life well organized. This sounds better: A person can get his life well organized without abusing his body, his family's trust, or his time.

Make sure to keep use either you/your all the way through or his. 

And (generally do not begin a sentence with and) that is the key point to living a happy life. Those are the keys to living a happy life. (you are referring to the multiple ways to be happy, so the last sentence should be plural). 

This is great writing! I corrected a lot because your writing is very good and I think you can handle it! Thank you for sharing. 

1.  Happiness, not hpppiness

2. The above point #1 is incorrect. It should be:

Happiness is an important aim that everybody pursuit  pursues. (Pursuit is a noun). Many elements like self-confidence, family relationships, ...But, it takes... (Better: But, it takes great effort...). Happiness is hard to  be defined define;...

First, it is impossible to measure it in its amount, and so, it is hard to describe the its degree.

(You could also say: First, it is impossible to measure its amount. Therefore, it is hard to describe its degree.)

Then (unnecessary), it is also difficult...In other words, there are positive happiness and the negative types. (write: there are positive and negative types of happiness). For example, (you could also use another transition), when you get lazy and decide to relax while you ought to work be working.

You may feel the pleasure of release but with guilty  of not having your work done. (You may feel the pleasure of release, but will also feel guilty for not having done your work or You may feel the pleasure of release, along with the guilt of not having your work done.)

So, not all the pleasure can be described as happiness. To the contrary, bad feelings can also count for (add to would be better) happiness. Such as hard works can be recalled sweet after the goal is achieved, parents' devotion to their children can also be a kind of happiness. (Sentence structure is strange, I would say: After the goal is achieved, hard work can be remembered fondly. For example, parents'...)

... First of all, a good condition of health is the guarantee of happiness; Illness brings sorrow. (this sounds awkward; say: First, being in good health is a guarantee of happiness or First, good health is necessary to guarantee happiness).

Secondly Second, most happiness for a human (unnecessary) comes form  the relationships of family I believe (unnecessary). However, most happiness comes from family ties sounds better. "The relationships of family" also sounds awkward. You would say familial relationships/family bonds/family ties 

1. "everybody pursuitS" because pronouns such as 'everybody/everyone/somebody/anybody/no one' are singular.

2. This sentence 'there are positive happiness and negative types' I'd write 'there are positive and negative types of happiness'. 

3. 'a human' can be replaced with 'human beings'. And not 'comes form' but 'comes from'. It is a typo)

4. 'without abusING'

5. 'Hard works' is incorrect. 'Work' is an uncountable noun. http://www.oxfordlearnersdictionaries.com/definition/english/work_2

Great job!