This question also doesn't have a blanket answer. This is entirely up to you and your preferences and comfort, and there is definitely no "insider secret" to carrying your keyboard case around. If you prefer using a backpack case, then you should look for a case with padded and adjustable straps. If you prefer cases with wheels, you should consider investing in a hard body case that has wheels attached. The wheel method is probably the easiest way to transport your keyboard, but it is by no means the best.