Thanks everyone for replying.
Jeannie, yes it can be difficult trying to balance how much insulin to give myself - no two days are the same unless I eat EXACTLY the same food (which would be boring for a start) and even then that's not including the excercise I may be doing or any other factors. But then the point of the insulin regime I'm on is to give me more freedom, and it does - it means I don't have to eat at exactly the same time each day and and I don't have to be too rigid with my diet (although it's best to stick to it as much as possible).
Gracie - thanks for that, I'll make sure I have a look at that!
jtu91952 - thanks, also. I originally kept a food diary when I was diagnosed way back in 1991, I stopped doing it a while ago in my rebellious teenage years! My dietician doesn't ask that I keep a food diary and I consider myself to be pretty clued up on how food will affect me but it's the fact that I get so much different info from all different areas that I want to work out for myself what works for me and what doesn't. I think, with diabetes, once you understand fully yourself how things affect you as an individual you are winning the fight!