Need Feed Back Right Away

My friend has a 89 dodge grand caravan he has a problem with the way it starts the van somtimes it just goes goes click and dont start and other time the van starts right up the first time Im thinking that the starter is going out but I dont know for sure Im going to go there in a hour and take a look at it I thought that I would ask to guys before I left.
PLEASE HELP

starter or starter relay, ignition switch, neutral safety switch (3pin sensor on transmission)

usually one of those, particularly the starter.

yea thanks after twenty hits are so to the starter and not workin I thought that I needed to start looking some where different all the Problem was
a bad battery