Holding onto digital information is easy. You might never hit the limit on your storage - or, for a few dollars a month you can add to your storage capacity.
However, consider if you'd keep all of this information if it was printed on paper. Probably not.
Today, go through your email inbox and delete emails that you no longer need to refer to. If you want to keep an email for reference, consider creating a folder in which to keep these emails.
Also, if you have more than one email inbox to deal with, check that you aren't subscribing multiple times to the same site.
We'll return to digital files multiple times during this year.