I have, conservatively, two billion houseplants.* I love the life and color they bring to my home, but caring for them can be a pain. Here's how I keep them alive:
Once a week, I collect all my air plants in a large bowl. I fill the bowl with water until all the plants are covered or floating. I let them soak for 5-10 minutes. Then, I remove them from the bowl, shake off any excess water, and set them out upside down in a sunny spot to dry completely. That's it!
For all my other plants, I use my sister's tried and true method of watering them from the bottom up. I used to always overwater my plants until I started using this method.
I start by filling an old cookie sheet (with sides) with about an inch of water. Then, I collect all my plants and set them on the cookie sheet to absorb the water through the drainage holes in the bottom of the pots. They'll soak up as much water as they need. Then, I set the pots on towels to let them drain before putting them back in their places. Just make sure the soil is dry and your plants actually need water before you do this.
*Maybe more like 50?