You can very easily send an Excel / Workbook as an attachment directly from Excel.
To send Excel Workbook
To use this functionality, your workbook need not be saved. When you use a step from below, it will attach that point of time copy of Excel workbook in the mail.
File > Share > E Mail > Send as Attachment
OR
ALT+FHEA
OR
If you need to e mail very often, you should add the E Mail icon to QAT (Quick Access Toolbar). You just need to press this button whenever you need to send the workbook as an attachment.
To add this to QAT,
File > Options > Quick Access Toolbar > Select All Commands in Choose Command From > Select E Mail in the box below and add it to QAT and OK
To send Excel Worksheet
1. Right click on that Excel worksheet
2. Select Move or Copy
3. Select [new book]
4. Now a new workbook will be created. Now follow the step given in To send Excel Workbook to attach in e mail.