Some ideas...

> Garage sale (with a group of friends and/or family) and donate the money to charity

> Post a link on your Facebook account where people can donate money

> See if it's ok to post a link on PC to donate money to your charity

> E-mail your friends and family and kindly ask them to donate what they can to your charity (send them a link or tell them how to donate to your charity).

> Post signs around your university telling people about your charity and how they can donate