I'm not very good with crafting, to say the least, and I'm not much good at photo shop either but it was still very easy and I really like the end result. To make the garland all you need is a cheapo Christmas foil garland that is not to thick, I used a 2 dollar silver garland from Target, card stock, a single hole puncher, scissors, photo shop, and a color printer:
To make a card all you do is select an image from the internet and drag it into I photo from there you can copy it into photo shop and then create a colorful background and add your desired text. The geek crafts valentines post explains more about how to do it. After making a card you just print it out on card stock and cut it out. In making my cards I was greatly helped by earlier geeks who had created cards with my favorite characters, for example all I had to do was google Star Trek Christmas to get a dizzying assortment of trekmas themed cards.
I made Trek cards from Kirk and Spock and Uhura and the Next Generation Crew
Supernatural cards from the Winchesters and Castiel
MST3K cards from Joel, Mike, and The Bots
Twin Peaks cards from The Log Lady and Agent Cooper:
And cards from Mulder and Scully of the X Files and the Futurama Crew (the X Files art work was created by some other sci fi nerd I just copied it onto the card):