Lemon honey tea, indeed. It also works to open nasal passages too, if you breathe the steam in while brewing it (stovetop, for me) or over the cup when it's done. Works wonders.
Aside from that, I heard Peppermint and Ginger work fine. Here's a couple snippets from another site:
"Halifax naturopath
Colin Huska recommends drinking peppermint tea to
relieve the symptoms of abdominal gas and bloating, and to relieve muscle spasms. It’s also good for nausea (without vomiting) and for heating up the body and making it sweat. If indigestion or
heartburn are problems, however, then Dixon recommends avoiding peppermint altogether. Peppermint tea can also be made using fresh herbs from the garden—and it's one of the easiest herbs to grow."
"Another great digestive aid, ginger can be used to
curb nausea, vomiting or upset stomach due to motion sickness. Make fresh ginger tea by simmering a piece of ginger root on the stove for 10 to 15 minutes—add fresh lemon juice and honey when you have a cold for a powerful germ-fighting combination. Beacon also suggests making tea from powdered ginger to ward off a chill."
Chamomile also helps with Insomnia, from what I've heard and read.