Yom Kippur

Arrange a clothing drive in your community

Sponsor a meal before or after the fast

Choose one person and do something nice for them everyday for the next week

Call your grandparents or an elderly friend after the fast to check in on them
 
Make a resolution for the upcoming year and commit to becoming a volunteer
 
Host a food drive for those who are not only hungry on fast days

Prepare a Tefillah booklet for those who may not know as much as you do

Contribute the money you would have spent on food for that day to a food pantry