Not long ago, I wrote about how I had to reset our TiVo Premiere to get suggestions working again. It worked great - suggestions came back, for the first time in months. Essentially the first time since we had had the unit.
The problem is that they soon went away again. I was about to scream. I would have pulled out all of my hair, but I really don't have any. So I went back to the drawing board.
I didn't want to go through all that process again, especially since I had just done it, and I figured that I was close, so I started thinking about all that I had heard previously. One thing that kept coming up was the timer. Apparently if you put your tuning adapter on a timer, it would bring back suggestions.