When your dust coffers begin to swell, you'll be itching to spending it to swell your collection. But it's difficult to know what you should be spending it on.

For starters, ignore Common and Legendary cards. Given that you get around four of the former in ever pack, you'll soon fill your collection of them.

There's no point spending dust to get one unless you've got plenty spare. Legendary cards, by contrast, are simply too expensive to be worth saving for at this stage.

Instead, focus on Rare and Epic cards. To begin with, you'll want to craft Neutral ones, that is, cards you can run in any deck. You'll just get more use out of them than class-specific ones. Once you've filled your boots with those, you can move on to class cards.

Also at the start, try to only create cards from the Classic set. These, together with the free Basic cards, are the core of Hearthstone's card set.

Other cards, from expansions, are part of a yearly rotation that sees cards older than two years relegated to "wild" games. If you're new to the game, it's simply not worth bothering with wild.

After you've filled in the Classic cards you want, it's safe to move on to the most recent expansion. You should get two year's worth of play out of that investment, at least.