1-Get the semi-finished material
2-Design your T-shirt
3-Sew your T-shirt
4-Place a paper inside your shirt so it stays stiff.
5-Cut a piece of ribbon long enough to go round the neck of your t-shirt.
6-Sew this ribbon round the neck.
7-Cut out some designs from the scrap fabric.
8-Glue/Sew them on to the shirt in a nice pattern.
9-Sew some beads onto the shirt.
10-Paint on some designs with fabric paint.
11-Hand wash the t-shirt before wearing.
12-Wear shirt and brag how you totally "designed" it.