This free microsoft excel tips no 7 is telling to make your sheet tabs to be colourfull. It may can make your worksheet show more gorgeous and simpler to switch to another sheet

Here is the step to do this
1. Right click on the choosed sheet.
2. Click Tab Colour
3. Select your preffered colour
4. Done

May this tips can be useful for you.
This free microsoft excel tips no 8 is telling to Protect Your Excel File with Your Own Password. It will be useful to increase protection of our file from unauthorized people to open it.
To place password in your file, do the following step :
1. When you save document click Tools
2. Click General Option
3. General Option Windows appear, fill your password to open or your password to modify. You can fill both password.
4. Clik OK, and retype your password to ensure you place the right password.
5. Click OK, and Your File now has been protected by your own password.

May it can be useful for you