Need a boost?

I finished the revisions for the online read last night.

Some of the kudos goes to this.

Boost bars are addictive. I haven't had one in ages for that very reason.

But with my energy levels low (after staying up the previous night reading until 1am, something I never do) I really didn't expect to get a lot done last night.

Instead, I finished the revisions!
And ate 2 bars.
Bad for the waistline, good for productivity.

What keeps you going when energy sags?