I live in a pretty big complex, and I am sending e-mails to my closest friends explaining the reason of the cause, and reminding them that it is important to be aware and contribute with something if they can't participate actively. So, I made a deal with them and I said: I am not going to ask you for money for free, I will clean your entire house for $60, so I will work for your donation.

And guess what! it is working! Or some friends don't feel comfortable with the cleaning and the immediately made a small donation.

If you don't mind cleaning bathrooms, try it!