In reply to Carpe Diem:
Speaking as a woman, I can't help you with your first question, but as I ran my first half a just over a week ago, I may be of help with my experiences!
Fistly, I didn't run after the wed, race was on a sunday. This was partly because I had broken my little toe, but also I knew that if it wasn't in my legs by then, a run on the friday wasn't going to help. My wed run was 4 miles at 8.5 min/mile.
I spent the day before making sure that I ate plenty of food and drank plenty.
Breakfast on the day was porridge at 6am, then we drove down to Dorset and had a cup of tea about 45 mins before the start.
Vest and shorts was perfect, and it rained.
There were eight water stations although I didn't make use of all of them to drink, plenty of water went on me though. Didn't worry about gels or sweets.
We maintained a pretty even pace throughout the race, this was important to me as my knees protest if I run too slow!!
The furthest I had run beforehand was 10 miles, so when we passed that distance, I just told myself that the rest was shorter than our 'short' training run back home.
I didn't feel up against it at any time, I relaxed into a good pace early on and made use of the scenery to take my mind off running.
I made it under the 2 hour mark by a minute, although I predicted that my finish time would be around 2.10.
You will probably surprise yourself with your time, good luck!!