how can i left sins i know what is wrong and what is write in islam? 

Praise be to Allaah. 

When
Allaah forbids people to commit sin, He did not leave them without help
to do so. He supplies them with means that help them to give up that
action. Among
these helpful means are:

 1-    
Strengthening
one’s faith in Allaah and one’s fear of Him.

2-    
Knowing
that Allaah is always watching and bearing in mind that He is with you;
He can see you and everything that you do is being recorded.

3-    
Comparing
and contrasting the fleeting pleasure of sin which quickly fades, with
the punishment of the sinner on the Day of Resurrection, and the reward
of the one who refrained from sin.

4-    
Keeping
away from the things that help one to sin, such as haraam looks, bad
company, going to sinful places.

5-    
Striving
to keep company with righteous people.