My vacation from december to february 2015
When my vacation begins i feel bored because i do not have anything to do in my house,
but while i am spending my free time someone said to me that i have to enjoy all the days and avail myself by improving something and I consider this.

To destress (<<<<i dont know what is "destress" )
I go to the beach to finalize and start the year,
now , In the morning I stay in my house , help my mother in the house cleaning.

In the evening i practice English and finally I do exercise in the nigth.
Now I can say that my vacations are productive.

My vacation from December to February 2015

When my vacations begins (began?) I feel (felt?) bored because I do (did?) not have anything to do in my house, but while I exspend (spent?) my free time someone said to me that I have to(should) enjoy all the days (every day?) and avail try(?) improving in some (some what?) and I consider these (I considered their suggestion?; I decided to use this website?) . To desstress elaborate, I go (went?) to the beach to finalize and start at the beginning and end of the year, (but?) now I stay im my house in the morning to help to my mother with the house cleaning. In the evening I practice the English and finally I practice at night I excercice in the at nightth. Now I can say that my vacations are productive.

I am not sure if you intended to express the present or past tense, or say what you do habitually. Some of the changes are not "necessary" but I think they sound better. Good luck with English! :)

My vacation from December to February 2015
When my vacations began I felt bored because I did not have anything to do in my house, but while I spend my free time, someone said to me that I should to enjoy every day and try to improve the english and I consider their suggestion. Then at the beginning and the end of the year I got to the beach, now I stay in my house at the morning I help to my mother to make the house cleaning. In the evening practice English and finally of the day I excercice . Now I can say that my vacations are productive.

My vacation from December to February 2015

When my vacations began i felt bored because not have anything to do in my house, but wile i expend my free time someone said me that i have to enjoy all the days and avail improving in some and I consider these. To desstress I go to the beach to finalize and start the year, now I stay im my house in the morning help to my mother with the house cleaning, in the evening practice the english and finally I practice excercice in the nigth. Now I can say that my vacations are productive.

My vacation from december to february.

When my vacations begins i feel bored because not have anything to do in my house, but while i expend my free time, someone said me that i have to enjoy all the days and avail improving in some and I consider these. To desstress I go to the beach to finalize and start the year, now I stay in my house in the morning I help to my mother with the house cleaning, in the evening practice the english and finally I practice excercice in the night. Now I can say that my vacations are productive.