Fun times ahead. Take a few days off and do nothing except for sleep, eat, and play with legos.

Don't think about income for a few days. You need to get used to the unstructured life first, and i know it took me months to get past the whole idea of looking to others for feedback.

Once you get past that point, then spend a few days with a notepad and just write every thought that comes to your head. If you have nothing you are interested in working on, that paper will most likely be blank and you can go back and find a new job.

If you do have something of interest, then come back and discuss (or spend some time on a prototype and then do a show HN :)