A weekly task - Have 4 sims browse the Internet.
Here I use the Geek heaven house but as long as you have 4 computers you can do this task . The computers do not have to be in the same house as long as all 4 sims are doing the task at the same time the task will clear.
I call all my 4 inactive sims to the house then click on the computer and select the task Browse the Internet. I repeat this for all 4 sims until they are all doing the task at the same time.