What I kind of hate about some DIY tutorials and t-shirt-surgeries is that sometimes it can all look so, er, homemade. Yes, that's nice and heartwarming when you're 8 and making macaroni cards for your sister (not complaining, sis), but there's nothing cute about wearing a "LOOK AT ME, I'M HOMEMADE" shirt that looks like your sixth grade home economics project.
This stops today. Make something that looks like you paid loads for it, why not? You can follow me until the end, or stop at whenever you're happy - this is Choose Your Own Adventure, after all.