I've designed cards for my kids in the past to hand out to their friends and they've always been a big hit (especially if their favorite candy is attached.) I usually design them to be printed as a 4x6 or I'll design them as a 2x3 and put two onto a 4x6 print so I can get more for my money. If your muse is gone, I would suggest getting ideas from creative people on Pinterest or places that sell personalized holiday cards like Shutterfly, Tiny Prints, or Minted.
Hi, this is Ann. I got inspired by Alison's valentines and decided to make one for my sweetheart. I used a heritage-themed digital art template and a colored picture from our wedding. I turned the picture B&W and added my personal message. Total time: About five minutes.