My grades and making a difference

Looking at my grades from last semester , I cant help but be a little disappointed in some of my grades. i know i got a D-  in my writing class which really upset me because i felt i was doing really well and then i was slapped in the face with a D. as far as my other classes go i did well but there is always room for improvement . This semester i have made some changes , i am not working as much so i can concentrate on my school work,  also i study more , take some weekends off from having fun and just mainly apply myself more then i have before, because i realized that trying to cruise through college is not as easy as it seemed and I'm to doing this for anyone else but myself so why not try harder to make myself feel good , and hopefully have an awesome job in the future.