Sacrificial giving

This question has been troubling me for some weeks now.  I ran a google search out of curiosity and was surprised at how many sites came up. This one stood out to me most: 

"[Wesley] offered himself as a living example of a lifestyle dedicated to radical sacrificial giving and free from the love of money. Each year Wesley calculated what he needed in order to live. Once that figure was calculated he gave away everything in excess of that modest amount. In one particular year Wesley lived on approximately £30 (in today's currency, approximately $2,400). In that same year he earned and gave away an additional £1,400, which means that he gave away nearly 98% of his earnings for that year. Early in his long ministry, in 1743, Wesley wrote, "If I leave behind me £10 . . . you and all mankind bear witness against me that I lived and died a thief and a robber." Wesley regarded his life and wealth as a stewardship, entrusted to him by God for the benefit of those around him."

So, according to Wesley’s example, sacrificial giving means all money not necessary for living ought to be given to the forwarding of the Gospel.  Wow, right? I can’t refute that, or disagree, yet I’m not sure I have faith to live in this manner, and perhaps I’m not called. 

Or am I? I don’t really know. I struggle with frustration sometimes because I hear so many organizations making requests for my money. I want to give generously, but it’s not always easy for me. 

Ugh, I’m in a funk right now. Seriously, though, I really want to know what y’all think? What constitutes “sacrificial” giving? Don’t get me wrong, I’m not trying to find a “magical number” that constitutes sacrifice. I know sacrifice is an attitude, but it’s also an action. So when I feel called to give, how do I determine an amount? I know God has blessed me richly in this season so I can give richly. 

Man, I was both dreading and yet extremely eager to attend the Finance class at Mars Hill this weekend. Alas, it’s been cancelled. Boo! So let me know if you have suggestions/ideas/thoughts.