Common home remedies...
 

I will start

Baking soda and water mixed kill upset stomach...

Hangover cure: More alcohol.

Kill hiccups by placing a standard white paper towel over a tall glass of water and drinking the entire glass quickly through the paper towel. I swear to god it works every time.

Weird

Shaving cream gets red wine out of the carpet.

I put this Cold Remedy together:

INGREDIENTS
1 1/2 cup cold water
1 TBSP loose mint tea (1 bag)
2 TBSP Traditional Medicines' Cold Care, or any type of teas for colds, sore throats, etc.
1/4 TSP cayenne Pepper
1 TSP ground ginger, or a couple of slices of fresh ginger (I prefer fresh)
1 TBSP sea salt (very crucial, so if you don't have SEA salt, use regular salt)
1/2 TSP Eucalyptus oil, or if you have leaves, crush a few up and use that
1 TBSP honey (optional)

Directions
DO NOT DRINK THIS.
Boil your salt and water on high. Stir in everything else but the eucalyptus oil,
reduce your heat to simmer and cover for 20-30 mins. Then, add your
eucalyptus oil, cover again and wait 5-10 minutes.

Alright, so while you're waiting, grab a big blanket or comforter,
something to stir the mixture with, and a pillow.
Find a spacious place to sit, like the floor. Take the mixture, while its
still hot in the pot with the lid closed to your desired area. Place the pillow on your lap
(in you're sitting on a chair or couch) and on the floor if you're sitting on
the floor. Pull the blanket over your head AND the pot and open the lid.
Start by cracking it a little bit to get the steam coming out. Close it if
it's too much, and stir it to produce more steam.
Do this for about 10-15 minutes under the blanket and you should feel golden.

This mixture is reusable and will last up to a week. It is important that when
you reheat this mixture, you do it on LOW heat because when over-boiled
and burnt, it emits a terrible gas. Also, you can add more water if you'd like.

Hope you guys enjoy it. I use it when I feel a cold coming on and it
usually shortens the life-span of my cold. I like it because it doesn't
completely stop a cold, it just makes it more bearable. It's important
to let yourself get sick and pretty much stick it out to the end. That
way your immune system can stay up to date and in good shape.

The one that seems to work for me is getting someone to hold your palm, lightly pressing it, while counting. They're normally gone by 8.

Do you think your it all in your head... No the hiccups of course but the idea of taking them away...

I think it's probably down to coincidence if anything.

peeing on jelly fish stings

Strangely enough, I have a pretty effective home remedy that works with all the above issues:

Upset stomach: More beer
Hiccups : More beer
Cold : More beer
Jellyfish sting : More beer