All that said, I do believe that God wants to take care of His people and there is nothing wrong with asking God to give you more than enough, especially when you use it for His purposes. Often we pray for God to bless me and mine, when a better prayer would be to ask God to bless you so that you could be a blessing to others.
God knows our motives for wanting more, we can't trick Him, so be sincere ... but I dare ya to ask God for extra and commit to giving that extra away to help others.
We should all cultivate an abundance mentality rather than a scarcity mentality. Be generous!