I have some of them on big sheets of paper hang up to my walls (stuff im learning atm), some using software (ie budget or project planning), lots on b5 paper

I have some of them on big sheets of paper hang up to my walls (stuff im learning atm), some using software (ie budget or project planning), lots on b5 paper blocks and loads on a4... works well for me. as well I use it a lot when planning thinking about new/current software.