If it is technical help that you need I would start of by using illustrator to design your logos, if you need help with getting to know the features of the program I've made a list of a few sites that could help (
7 Terrific Tutorial Sites ). If it's the process you're not sure about then Jacob Cass (Identity Designer) has a great site with articles dedicated to logo design, I would really recommend checking him out (
JUST). You need build up ideas around what the client wants to express through the design, designing a logo is just about designing something that first comes to mind i.e. using a house because your designing a logo for a real estate company, a lot of thought needs to go into it.
I hope some of these links help,
Tom.