Step by step I created on how to maximize free Dropbox storage space. I am a current user.
1) Get referred by a current user - 2.25GB otherwise 2GB if you are NOT referred
2) Complete this Dropquest (stated to end in 2 weeks ie. 1/29/2011) at http://forums.dropbox.com/topic.php?id=30339
3) Complete at least 5 of 6 easy getting started tutorial steps on https://www.dropbox.com/gs
4) Complete the tasks at https://www.dropbox.com/free
4a) Connect your Twitter account with Dropbox - 128MB
4b) Connect your Facebook account with Dropbox - 128MB
4c) Follow @Dropbox on Twitter - 128MB
4d) Send a one line comment about why you love Dropbox - 128MB
4e) Tweet about Dropbox for more free space! - 128MB
5) Refer new users who register AND install the Dropbox desktop client - 250MB per referral up to 8GB
6) Link your account to a .edu email address at https://www.dropbox.com/edu
- doubles storage referral bonus (retroactively as well) to 500MB per referral up to 16GB
I'm open to PMs. Cheers.