Indoor Tulips - Fill glass container about with glass marbles or decorative rocks. Set tulip bulb on top of marbles or stones; pointed end up, add more marbles or rocks; so bulb is surrounded but not covered. Pour fresh water into the container.
Boiled Eggs: Don't throw out the water you boil your eggs in. It contains tons of calcium plants love. Let water cool and dump it on plants. Save egg shells, rinse them out really well, crumble, then mix in with dirt and/or potting soil before planting.
Rosemary is easy to propagate, and sometimes roots will develop even in a glass of water on a sunny windowsill. I have found that the best time of year to take cuttings is in the late fall and early winter.