According to my knowledge, the rules go as follows:

1. Being unemployed for more than 90 days will make your OPT invalid. This means you are virtually out of status.

2. Virtually, because you still have 60 days of grace period to change the status.

3. This grace period is actually period for you to prepare for going back home :). However, you can go back to school, and thus maintain a valid F1 status.

4. However, there's no way you are going to be able to work, because this grace period is not for "revitalizing" your OPT (otherwise they wud have said 150 days instead of 90, as simple as that).

5. So, the best way is to find a job, somehow or go join a consultancy if you are an IT related graduate. Otherwise go back to school. Well, going back home isn't too bad of an idea :)