I have used a method for many, many years to help make it easier. I have created a "Communication and Form Binder." You need to get one pocket folder for every two students that you have. Use a three hole punch and put in a three ring binder. Number or label each pocket for a student. I use a number system. I could make it "Cute" but it serves its purpose...look how faded out the folders are!
As slips come in, I check them off and then place them in the right pockets. I also save any important notices from parents and absence notes. I am starting a communication log that I will keep in the front for any conversations about a student in person or on the phone that I might want to document.
I also got a new idea from Ginger Snaps about sending home papers that need to be signed and returned in a special manila envelope. I used her idea for our Open Door Day and it helped. I typed up a sheet with specific directions for each form. You can't miss it on the neon paper. After two days, I am only missing three students' paperwork.
I hope this will help you. I spent the day getting myself organized and now I am all set until next week!