Top 5 ways to find ideas for your (geek's) next side project.

1) Hacker news front page -

2) Make a list daily of all the problems you face throughout the day.

3) How can you help your family members - List the pain points of your family members and close friends.

4) Make a list of your strong desires.

5) Do not consider money , security , greed while choosing your side project.
all risks can be taken. you are free.

Alternate less solid ways :

a) call other geek friends and ask them if they are working on a side project and you can volunteer.
b) visit your local political party/church/ngo and ask them if you can volunteer.