Hi Woony you're more than welcome so lurk on!
Re energy drink, I tried lucozade sport once (ready-made bottle form) and found it really sickly. I then discovered Powerbar lemon flavour powder which is ok, but lately I find this turns on me after a while.
I've never tried a gel, but on my last long run I took a High 5 (I think) energy bar with me and had it after about 1hr 45 mins, and I found it tasty and easy to eat. Only problem is where to carry it - I can't decie whether to wear a bottle belt for the race, and even if I do, not sure if the pocket is big enought to carry 2 energy bars. Oh dear...all these decisions!
Just came back from lunchtime speedwork:
8 min warmup, then fast bursts of 1, 2, 4, 2, 1 mins with 1 min jog in between each, then repeat sequence before 8min cool down. Made an interesting session and not too hard on the legs after my race on Sunday.