At the park when an idea strikes? Write it down on a piece of paper. No need to have your face buried in your computer every second you're at a park.

Edit: All you have to do it jot down the idea if your worried you'll forget about it. You don't have to hand write out all the code that would be silly. I find having a small notebook with me is pretty handy.

It's no better to have your face buried in sheets of paper. And who carries paper and pens around anyway?

For the record, I carry a journal and pen in my pocket all the time. Writing down phone numbers and notes, taking a log of my life, keeping cards from businesses. Looking back through them is much more enjoyable than looking back through a Wordpress.

http://shop.moleskine.com/FileLibrary/4be794eb3e094e59ac8a8f...

I was being a tad facetious. I used to as well, but these days I just use a smart phone or tablet with a suitable note taking app, since I always have one with me anyway. My main point is I don't see the difference between taking notes digitally or on paper.

Are you taking your laptop with you to the park 'just in case'.

I sometimes am. Definitely when the park happens to be in another city I went to visit for some reason - I feel bad without having a proper computational device with me for longer periods of time. What's wrong with that?

I often have it with me because I'm normally out to meet with people and collaborate, but stay out before and after:)