General

When I'm actively pushing to gain and I have a later shift at work, making sure to eat something by 8am, otherwise I won't eat until 10/11 or until I get into town before work.

8am is the perfect time as I'm usually also able to eat again by 10/11.

I don't know if this counts, and I don't expect this will be a regular thing, as I haven't been doing this every day.

But a few times, shortly after waking, instead of regular coffee I made what's in essence a heavy cream based cafe mocha. That's 1 cup of coffee, 2 packets of hot chocolate power, and about half a cup of heavy cream. Adds up to about 720 calories, apparently. It also seems to help quell the hunger I might have, particularly when it's not convenient to eat something.