Rock.

I have a mechanical doorbell at my house that I adore. I'm never getting rid of it.

fire!

Recently made some jam. Was really impressed by how low tech the process was. Just cook some fruits, separate the roughage and branches and seeds, etc. Add sugar and cook it again. I believe you also have to add pectin if the fruit you’re turning into jam doesn’t have a lot of it.

Then bottle the stuff and enjoy it with bread for a long long time!

I like to get all up in my snuggie. Get a little weird.

Candles

I'm a huge coffee drinker. Used to have a machine. It broke. Bend using an aeropress and French press for awhile and find that I really don't miss the machine.

Chopsticks

As a user of threaded fasteners, the inclined plane.

Stools

Well, of course, the greatest human invention...

Toilet paper.

Exercising equipment. Jump rope, dumbels, pullup bars, rowing thingie and such.

Using a brush to paint my house as opposed to an hvlp setup

Sleeping pad shnozzle bags (pump sacks).

Knipex Cobras. It's like being able to pinch anything with a force of about ten tons per square inch, they're indispensable

The Thermos!