deciding what to make

Today im going to google all the supplies i need to make my cases. But first i need to see what type of cases i want to make. to make crystal cases- I'll need  e-6000 glue, a plastic iphone case, tweezers, cyrstal or any type of 3D object. to make a  chervon glitter case i'll need- mod  podge glue, glittler,chervon tape, markers, paint brushes , and plastic phone case. this is just list first 2 cases i wanna make after these 2 cases then i'll see what other cases i wanna make. In making the cases i'd problay make iphone 5's, 6s, 6 plus, and maybe some galaxy cases.