Test manga by reading what is in the front of the shelf
When buying pull one from the back of it for it to be in the best condition

When buying important collectibles have one to use regularly, second to have a backup, and third to keep in a vault from elements to preserve for ages

Get your friends to queue up for things in time intervals that are just fine so that you can swap places with them after you get one thing, go to the other friend and take his place to buy another and so on to save time and queue placement
Otherwise you dont get all the available haruhi porn at the next comike

Learn which is the head of the cornet and which is the back