It would probably help if you could find something else to do during that time you're waiting. If you are only interested in doing end game/instanced content, well, that could be an issue.

Myself, I can always find something to do. Daily Roulettes, daily treasure map, level another class, gather stuff for money or level a crafting class. There's tons of things to do in game, but if you limit yourself to one then there's not much you can do about that.