Email: Many places on the internet you are suggested to enter your email address either it is to receive newsletters, or registering accounts, or buying stuff.
Entering your email address make you in risk of either being flooded by mail from services, spam, receive unwanted mail, ads, or even virus. But there are an easy way of avoiding such. Som shady websites even sell your information on the black market and make moeny from it. This information is then used for spam, fishing, spreading viruses or other scams.
In addition to your own personal private or even work mail account I would suggest you to create a free trash account. Go to a free email account supplier and register for an account for this purpose. Call it yournameweb (for an example lisabuweb, or libuweb if you name is lisa burdon, or something else). This account you can use when registering to services and sites on the internet. All mail from those sites and services goes to your yournameweb mail account and you do not have to receive mail from all that in your personal mail or work mail account. And you also at the same time get a private username for all of those accounts when you sign in using that yournameweb mail account. You get a better privacy for your self, and your personal mail or work mail is free from such email from services. The risk of your personal mail or work mail being spammed is decreased.
NOTE THAT YOU SHOULD NOT DOWNLOAD EMAIL FROM THAT ACCOUNT TO YOUR COMPUTER USING AN EMAIL SOFTWARE. Some of the point getting a yournameweb mail account is to not download mails from it to your computer. Read it online and do not click links you do not know what is. Then you are in lesser risk of being infected by virus, spammed or what ever nasty you can get registering many places.
Since I got my own yournameweb mail account my personal mail account is free from all the irritating mails from services and such. All I get is what i really want to receive in my mail, I just check in my yournameweb mail account once in a while to see what is new.