Hm, don't really have any answers, just wanted to say I do something similar sometimes and it was confusing to me too, how to keep track of things. Still tweaking the systems..
Basically I just put stuff on paper and have 'mini-folders' for agendas and stuff in gmail for e-mails (drafts or mailed to myself).
I 'pull' stuff (like info and/or my own thoughts from journals/drafts) onto a new piece of paper, with 'bullet points' of what I actually need to say to a person/do. (Not sure if this makes sense? Basically analysis of incoherent thoughts and ideas into doable sayable things.)
I don't like Outlook cause I need to be mobile with this too.
There are programs for eg PR work which I was considering at a time but haven't tried yet.
Some people also had a card-system for recurring clients/tasks on a regular basis. (Which I also haven't figured out how to do yet.)
What are other salesmen using? Might wanna check or ask around?