Roses are, of course, great in love spells or as an offering for Venus or Aphrodite. Eucalyptus has healing and protection attributes. Bay leaves are used for strength, protection, healing, cleansing and aiding in developing psychic powers. I've added it to water before to help with cleansing.
Just make sure that birds are not using a nest before taking it. Also, be aware that it is technically illegal to have bird feathers or nests in the USA. No one's going to bust down your door or anything but it could be a problem if you wanted to sell these things or something made with the feathers.
You might be able to make a wand out of the driftwood. Sea glass can be used for divination purposes. I've seen some rune sets made from sea glass. You could also make a pendulum or just toss the sea glass like you might toss bones or seashells.
How are you getting kitty whiskers? o.O I assume you're not hurting cats. I would use cat whiskers for happiness and luck spells as long as you did not hurt the cat to get the whiskers. But if anyone hurts a cat for magical purposes, may Bast curse them for the rest of their lives.