Many fuzzy leafed plants, such as African violets, don't like water on their foliage because it leaves spots and can cause fungus. Deliver water past the leaves and directly to the roots with a simple funnel made from the handle of a plastic milk jug.
A lazy susan comes in handy when potting or trimming a plant. Partially fill the pot with soil and set it on the lazy susan. Position your plants and slowly spin the lazy susan as you finish topping off the soil. When trimming plants, you can easily cut with one hand while carefully turning with the other. This technique would also work when decorating or painting pots.
A good way to increase humidity around potted seedlings is to set a couple of seedling pots in a larger container of pebbles. The pebbles should be about fingernail size, and there should be just a small amount of water in the pebble container- enough to create humid conditions but not enough to touch the bottom of the pots.