25 O LORD, save us;
O LORD, grant us success. (Psalm 118)
It's not a bad thing to ask God for success, for accomplishments, for a job well done. Our faith is not measured by how much we suffer and how much we lose; God wants us to perform with excellence. So when we're faced with a situation, we should pray, wholeheartedly, for success. We should want to surpass all expectations in a job, for any given opportunity, doing it for His glory.
I guess, I've often felt it was somewhat selfish to want to get A's in my classes, to be the cream of the crop, or to be considered a reliable and good worker. If it's not fueled with greed, but rather a godly desire to do well given the task, I think God wants us to want success. We ought to pray, and if our hearts are not right, then He will change our desires. However, we should always want to be successful in the light of what is holy. We should want to represent God as high-achievers and not slackers.