For best results we recommend a cold wash, by hand. But seriously, ain't nobody's got time for that. Machine wash (with cold water) then if you wish, but please wash inside out and do not iron on the print.
We are indifferent on how you should dry your washing. Outside, soaking up some vitamin D is always nice, but if you are unsure, ask your Mom. However, your t-shirts will last a bit longer if you avoid tumble drying them.
If you want something that will last forever, buy yourself a diamond. Make peace with the fact that your t-shirts will fade over time, like your memory.