Annoying charities... rant
There are a few national charities that I give to a few times a year. Mostly I'll send them a check for $50-100. I give what I can, when I can. Occasionally I'll give more. I ABSOLUTELY HATE IT when the charity turns around and sends me a form letter saying, "Thank you for your $100. Please give us $250 next time", or something to that effect. Just say Thank You. DON'T ask me for more next time. If I'd wanted to/been able to give more I would have. Don't be greedy!
(OTOH, I've found that local charities don't do that. They just acknowledge the gift graciously.)