User blog comment:WheatyTruffles/Calling Out to All Fire Emblem Veterans/@comment-1342581-20150302184502

I've played through the game and my advice is.

1) If the merchant is selling a perma-stat boost item or a master/second seal BUY it, weapons can be bought anytime by spotpass teams you can summon.

2) Since you're on Normal you can abuse reeking boxes to earn money and experience for any character. (I'm guilty of making 70,000 from it)

3) Get a skill and class guide I personally use User_blog:Nauibotics/Awakening_Class_and_Skill_Guide and http://www.gamefaqs.com/3ds/643003-fire-emblem-awakening/faqs/67148 for ideas with re-classing as well as http://www.gamefaqs.com/3ds/643003-fire-emblem-awakening/faqs/68672?page=1#section16 to figure out what to get through spotpass.

This is what I've found to be useful.