Where can I get custom Magic: the Gathering cards printed?
I've printed decks to playtest with friends before buying the actual cards. I just went to a local print shop. Everywhere has one.

I didn't bother printing backs. I just sleeved the cards. For rigidity, I backed them with real cards or those silly advertisement cards you get in booster packs. As long as you do that for every card in the deck, it should shuffle correctly.

I use the images from magiccards.info since they have a higher resolution than Gatherer's. To get the cards to display right, I create an .html file with the following content and print it to a PDF using my browser.

&lt;style&gt;
IMG {
   height: 3.46875in;
   width:  2.46875in;
}
&lt;/style&gt;

&lt;img src="image1.jpg"
&gt;&lt;img src="image1.jpg"
&gt;&lt;img src="image1.jpg"
&gt;&lt;img src="image1.jpg"
&gt;&lt;img src="image2.jpg"
&gt;&lt;img src="image2.jpg"
&gt;&lt;img src="image2.jpg"
&gt;&lt;img src="image2.jpg"
...
&gt;