Many a times it happen that we create a doc,spreadsheet etc in Google Drive and need it to send as an attachment to any of the colleague or client rather than sharing it with them.There is a easier way rather than downloading the doc and attaching it to the mail.
Steps
1) You just have to open the doc,spreadsheet etc in your Google drive.
2) Then goto the file menu and select "Email as an attachment" option.
3) You can also add the message body and send the doc.