If daily step goal achieved, then add to "lifelog" spreadsheet in Google Drive. Don't forget you can use Fitbit tracking for free if you have iPhone 5S!
If
Daily step goal achieved
This Trigger fires every time you achieve your daily step goal. Learn more
Then
Add row to spreadsheet
This action will add a single row to the bottom of the first worksheet of a spreadsheet you specify. Note: a new spreadsheet is created after 2000 rows. Learn more
Discover more time saving integrations for Google Sheets and Fitbit