I went through a similar phase where I couldn't focus or do anything productive. So I took a break from everything, did some lawn work, re-did my home theater, got a new puppy :) After few weeks of break my partner and I got back together to start things about ideas to work on and within a week we have a list that we can pick from.

Before that I remember we spent weeks without one decent idea.

On a side note, puppy is a lot of fun but she will poop and pee all over the house until housebroken :)

Good Luck