You can use 5x8 cards, bound with a ring. Or buy "card stock" paper and cut them into halves. On one side, I fit an abreviated Hx & admission physical (just positives), med list, problem list, CXR/EKG/other studies, and consult service pagers. (No, you don't have to write in super small font). On the other side, labs, events and todos--should fit in 7-8 days, which covers most patient. All on one card! Use your pocket snellen eye card or any plastic card as a ruler to separate the various sections.
The other thing I use is a MS word "sign-out sheet" with 4 columns:
#1 name, MR#, PMD pager, allergy, etc.
#2 med list
#3 problem list
#4 empty (for todos)
This sheet is updated daily (takes 5 min.) and should fit all your patients on one sheet, if you use size 8 font. It's very useful.