Activity Best Practices

For Account Management

• Log activity on the Contact level, it will also show up at the Account level.
• Subject field best practices
  • For calls:
• Must use Type field
  • Calll
  • Demo
  • Prospecting
  • Meeting
  • Account Management
  • Other

For Opportunity Management

Notes

An activity?s Related To field helps determine an activity?s relationship to an account.

CONTENT OF THE RELATED TO FIELD | RECORD THAT THE ACTIVITY ROLLS UP TO

• An account
• That account

• An opportunity
• The account on that opportunity

• A contract
• The account on that contract

• A custom object with master-detail relationship with the account object
• The account on that custom object record

• Something other than the above, including empty
• The contact?s primary account

"Last Activity"

• The Account and Opportunity objects have a field called "Last Activity", this is updated any time an activity is related to it.
• The last activity date for a record is either the due date of the most recently logged event against the record or the most recently closed task associated with the record.
• The last activity date for an account record is based on all the activities that roll up to the account via the Related To field. For an account, the last activity date can represent an activity that?s related to an opportunity. The last activity date for a contact or lead is based on all the activities that are related to that contact or lead via the Namefield.

Reference

https://help.salesforce.com/articleView?id=activities_view.htm&type=5