There’s a way to quickly switch between them on your google products.
Click on the top right where your name is and choose account settings. On this page under “security” there’s a Multiple Sign on option. Click “edit” and then turn it on. IMPORTANT! You will need to read the 4 options and then check the boxes so that you acknowledge you have read them. They have info about the usage of the multiple log on!
After you have done this, the same drop down you clicked to get to account settings will now have a “switch account” option on the bottom right hand corner of it. Click that and then choose “sign into another account”. Add your username and password here. Each time you want to change accounts, this is where you will go; you won’t have to re-login each time!