If I see that someone is being lucky and has more succes I usually dont care but if we do some thing we both need to do or want to do and I have less luck than some other person I try my best to do it even without that help and then look on it and think "I did as good as you did, even without help but I did :) "

No matter how lucky people are You can still do good or even better if you try and believe.

Sometimes we don't realize how many blessings we have and our eyes get stuck to someting that someone else has. I think everything is fairly distributed to all. For example he/she has a lot of money but not ashealthy as you... Most probably he/she can sacrifice all their money for having something that you don't give much value. I think we have everything to be happy, don't we?

*but it means something...

I don't know why I wrote "the it"!

To be honest, I think people should try to not let their motivation be affected by other people's success.

I'm not saying that people shouldn't try to excel. I'm saying that you trying to excel being contingent on how much other people succeed is a personality flaw.

In other words, I think that your motivation shouldn't only exist when others are doing better than you.

Just a few quick corrections:

The title should be "What do you do when you think something's unfair?". What you wrote wasn't grammatically incorrect (except that you misspelled 'you'), the it means something different than what (I think) you intended. Also, using 'it' is very confusing if we don't know what you're talking about. 

"...to make much efforts" should be "...to make more efforts".

"Give in the fate" should be "Give in to fate".

"Easly" should be "easily".

in my opinion you are wrong,because I seem 'grass is greener on the other side"you earn some stuffs that you afford alittle bit and when your friends or stranger earn them it will be bold for you and quickly comper you with them. it deponds which wishes you want to have and how much is it cost for you.so just keep working the same as your friends and others :)