~~I only do it whenever I have extra income and I make sure that I wouldn't be trapped by the desire of winning cause that may lead me to higher loss if unfortunate.~~
Good man! You did the right way, mate. It is true that just use the extra money for gambling and never think to spend your main money. Remember that we have a lot of things to fulfill daily, weekly, or even monthly. It should be a big problem if we spend all the money just for gambling. And yes, don't be greedy since it will take you down at the end. 
Really nice to see people are being good for gambling and they are getting interested in gambling. We make a list of days and then I gamble only in my free days. I think we should not disturb our study for gambling and gamble only if we get spare time from our daily working or studying routine as I use to gamble only in my free time and mostly at night time.
Yes , we all know that gambling really makes us happy but keep in mind that we should make our priority in order so that we can have a peace in the future and it can help us in many things as well. Study first and then gamble when you graduate, or gambler when it is after your exam but I really dont recommended it. You should study before gamble.