Mist with water. Put some blooms in, but watch out for spiders. Then, put them in a dark room. The darkness will keep them calm.

I use gatorade to feed them.

Here is a link that might be useful: Click here for Video on Hand Feeding Monarchs

Take and put gatorade in a small flat dish that is not deep. Get a toothpick. Pick up your monarch and holding her firmly close to the body with your thumb and finger over both wings, put the feet into the gatorade. Take the toothpick and gently unroll the proboscis if she doesn't stick it in the gatorade on her own. As your unroll the proboscis, you want it to come in contact with the gatorade. You can put one of the tents made from the tomato cages or a pop-up hamper over her to keep her from flying away after she nectars. She should nectar for several minutes.

This is how we were taught at the Monarch Teacher's Network workshop. We did this everyday with the Monarchs that we were saving to release. We didn't wash any feet after feeding the butterflies. This is similar to the video.

And, as Runmede said, Keep the Monarch in a dark place so that she won't expend energy.