I have 2 toddlers (B3-G2) and have an incredibly hard time managing them when its tantrum time.  They can get pretty cranky right after daycare before dinner at 630-7, managing one tantrum isn't bad but they have a tendance to feed off of each other and then both go crazy.  Tantrums are inevitable at this age but since I'm out numbered its turning into a cycle that I need to prevent, any suggestions on how to keep them from doing this? 

you're right, it is normal.  try time outs - they work for us.  We have a 2 1/2 yo son.

I've found with toddlers who are cranky around dinner time, it's usually because they're hungry and tired... if you have the time, trying to feed them dinner earlier in the evening, or a snack to tide them over until dinner can be fixed, may help. Otherwise I would suggest separating them and keeping them focused on different things so they are less likely to feed off each other so much.