Getting space in a hurry

I'm away from my computer with a photo opportunity, and my phone tells me that there isn't enough space to take photos.

I could start deleting songs or apps or whatever then go home. But what I'd like to do is what I do at home when there isn't enough space to delete an app - and that is to temporarily not sync songs. Then check the box to sync them again. Or in this case, backup and restore when my "Other" memory got big.

I want to recover all of my settings and songs and everything when I get back to my Mac - but have space to take my photos now.

What is the quickest way to do this?