A common problem that I face is that when I'm needed, I think that I have to give a lot. But the truth is that you don't have to over-give in most situations. Instead giving a just-right amount of time, money, or needed materials is likely the better solution.
I learned this from a few peers who do just that. I worked with a generous woman who always donated something to any need expressed. She didn't give more than what she could handle, but she always showed her care and respect by a small act of kindness. That was a great example for me. Another peer typically donates a little bit when asked by charities with the notion that all those little bits that people donate, add up to a significant total.
The key is to give what you can and to give with a good attitude. When you give more than you're able, you typically counteract that gift with a likely burdened attitude or mindset and that does no one any good.
To be generous is an awesome way to be and to understand how you can be a healthy, happy, balanced giver is even better. Onward.