from Treehugger
(Condensed)

1. Tame stings and burns
Cool tea bags can bring relief when applied to bug bites and minor burns, including sunburn. For overall skin irritation, put spent tea leaves in a bath and soak.
2. Soothe your eyes
The tannins in tea have anti-inflammatory effects, which is why cool ones are often employed on puffy eyes. (The chill also helps with swelling.)
3. Feed the garden
Use tea leaves as food for garden plants — green tea is high in nitrogen, and as a bonus, the leaves can ward off pests and insects. This is also good for houseplants, so add old tea leaves to their water.
4. Boost potted plants
When potting plants, place a few used tea bags on top of the drainage layer at the bottom of the planter before adding soil. The tea bags will help to retain water and will also leach some nutrients into the potting medium.

from Treehugger
(Condensed)

When you are done brewing, instead of throwing out those coffee grinds or putting in the compost put them to good use

​1. Soften  Your Skin
Exfoliate with a body scrub made of coffee grounds, coconut oil and a little brown sugar. 

2. Please the flowers
Use coffee grounds as mulch for acid-loving plants and evergreens. 

3. Sadden the ants
Sprinkle coffee grounds around areas of ant infestation to deter them.

4. Make a sepia dye
Soak used grounds in hot water and use as a dye bath for Easter eggs, fabric and paper for a lovely, soft brown tinge.

5. Encourage the carrots
To boost a carrot harvest, mix seeds with dried coffee grounds before sowing.