master the skills

Today i have some work to do,and every thing i work independent.not same former that doubt of my ability ,i can do it?
and now although something i doesn't can do,but compare with former.my thing is change.just do it you can learn a lot of from your work,and you can quickly master the skills,and you can do well in the future.
about work,in my opinion i should use our brain to think about it,why there is a problem,the reason come out ofen or very less,this we should consider in our every day work.
I think can use our brain more in our every work is importance.