I like the carbs and cals book for carb counting. It's pictures of different portion sizes of various food with thier weight, calories and carb grams listed. I do check the packets for bread and things as it is only an average but it's good when eating out. Better than my blind guessing anyway.
For a lot of things I use the tesco website, as they have the nutritional info from the packets on thier. One day I will get the hang of reading the packet before tearing it open, or at least not tearing the part I need to read.