If you are already set up to search from your favourite database then that is the most effective place to search. Otherwise, Google Scholar can be a useful source to export basic citation details for a wide variety of publications.
Go to Google Scholar
Click on the Triple Bars icon and go to Settings
Under Bibliography Manager select 'Show links to import citations into'
Select 'EndNote' from drop down menu and save
Carry out a search
Click the 'Cite' icon under the citation you would like to import to EndNote.
Click on 'EndNote' from the pop-up box
A tab will appear at the bottom left corner of the page
Double click on it or click on arrow to open.
The newly imported references will appear in the Imported References group. Click All References to return All References to view.