First, I have two notebooks- one for Monday/Wednesday groups and one for Tuesday/Thursday (we have Fridays for evaluations, meeting, billing, etc. in our district).
My Tuesday/Thursday binder has a red cover. I am using 1 and 1/2 inch binders this year (I used to use three inch binders but they took up the whole table!). I have plastic dividers inside both that separate the groups by the time they come for speech.
This set is double paper-clipped because their are several for idioms, antonyms, and multiple meaning words I printed out. I like to have these not only so I don't always have to pull out a deck of cards for each student, but I can give the sheet to the student to look over while I am having another student practice their skills.
You can also see I love me some post-it notes! The post it notes have an activity for Monday and one for Wednesday. On Friday mornings I look over what the group did the previous week and then I put on a post-it note for what we will do the upcoming week. I also add notes on it like if I have to take data for a student's annual IEP. Simple, not fancy at all, but works really well for me.
My data sheets I use are in a previous post so check them out. This is the system I have found that works for me. What is your way of organizing all of the data you collect?