Looking at nutrition, for both training and HIM/IM events...
So far, I've been using sports beans and gu gel and powergel. I'm not a fan of the beans, so I'll probably just finish what I have and not buy more.
I don't notice a big difference between the powergel and the gu, although powergel seems to be cheaper. I have more than half of a 24 pack (1x caffeine, strawberry banana) left, so I'll probably just use these.
But I also want something more substantive for the bike portion. Cliff bars have been pretty good, as have powerbars, but is there an advantage to using chomps or Powerbar energy blasts?
I also use a gatorade mix and will carry salt packets when it's hotter.
I had used perpetuem in a marathon a few years back, wasn't bad in training but (and maybe we did something wrong) it actually made 3 of the 4 of us sick during the marathon on a 80 degree day. I'm on the fence as to bringing this back for the bike.
What do you use for your 4-6 hour events?
ETA: also looking to buy a aerodrink, something like
http://www.amazon.com/Profile-Design-Aero-Drink-System/dp/B001A0CGII/ref=sr_1_7?s=sporting-goods&ie=UTF8&qid=1377622818&sr=1-7&keywords=aero+bottle+bike