kittenpie's bring-down-the-fever hack:
To help comfort a kid with a fever, one of the great things is of course to run a damp cloth over their forehead, neck, and limbs. My child's bedroom is not near the bathroom, though, so if I know she's sick and may wake up hot, I will tuck two baby washcloths and a bit of water in a Ziploc bag and leave it in her room so it's ready, if I should need it, instead of having to leave her upset while I run downstairs to get a cloth. Remember to empty it out if you don't need it, though, or you'll have a bagful of mildew, which is a little less healthful.
Or, keep a stack of washcloths and a sports bottle full of water handy.
Related: Cold washcloth helps teething