[papadell]

Keep playing and doing the programs they release. You'll earn free packs and cards that way. As the year progresses, the player programs will start spitting out 90+ diamonds. Working on the inning program through the tasks, missions and gameplay will get you good cards as well.

They do a really good job of giving out content just for playing. You'll definitely get better cards as the year goes and power creep sets in.

Also: don't forget about Parallels! As you level up cards and potentially get the max +5, you can turn golds into diamonds and diamonds into better diamonds. Especially when stacked with Inside Edge on live series cards.