I promoted units at level 10, sold all my second seals, didn't bother to reclass, not knowing the existence of Galeforce, not Leveling up Sumia thinking that she would be a terrible unit due to some forums I've seen before, I didn't use Lissa, I married units to ones that would give bad stats to children, I didn't reclass after level twenty, I passed down the worst skills, and I didn't marry Cherche or Panne. I was crap at Fire Emblem before I started playing Awakening, I got better though.