If you don't have time to make a card from scratch, you can still create a semi-homemade card that will equally impress your recipients. Purchase greeting cards and add your own special touches to make it your own.
For example, use layered construction paper to jazz-up the inside of the card. This will add color and provide a nice surface to include a hand written note. Use a metallic pen and your greeting will really pop. Another idea is thread yarn around the outside of the card to create a custom border. It will add texture and interest to your store bought card. If you are artistic, include an original sketch on the inside of the card to provide recipients with an unexpected surprise. Other ways to showcase your craftiness is to tie a ribbon around the outside of the card, decorate the envelope or add a little glitter for some extra sparkle.