First of all, that title is a little bit misleading. Some people like to use words… some like to use pages… others will only set aside blocks of time. It really doesn’t matter what you use to measure progress, though. Whether you write 5,000 words per day, or 5 words per week, progress is progress.
While setting a goal is important, one part of the process that people tend to forget is setting ‘reachable’ goals. Something you are actually able to do. Not only does this mean setting an attainable goal, but to also take into account what you are physically and/or mentally capable of. Those with disabilities and/or illnesses (be they visible or hidden), aren’t always able to sustain, maintain, or even reach goals that are repeated on website after website (such as: Write every day). So, the caveat regarding advice is: Take what you can, throw away what you can’t, and tweak what you need to for it to fit your needs.