Sometimes I get a back of lemons, limes, or oranges to put in a bowl as a centerpiece or decoration when company's coming. After the event I squeeze the juice into ice cube trays then keep the cubes in a zip lock freezer bag. It takes a bit of time, but I have it handy in about tablespoon portions for recipes, real margaritas, etc. Plus, the fruit looks nice on the table, mantle, or buffet. Nice change from flowers, and sometimes too many flowers around makes it look like a wake : )
I also buy a bunch of garlic and chop it in the food processor, put it in a jar, cover w/olive oil, and keep in the frig. It keeps a long time and I like having it handy after work.