Modify the html template you buy from Theme-forest or any other template provider.
* Modify text, font, color of the text,
* Replace images, change image size, change the image border or underline or anything that is related you want to change,
* Modify menu by, adding new button, changing the order of the menu, change the alignment or size of the buttons.
* Make changes to the layout like the base color, fonts, typefaces, borders & quote elements, adding or removing extra tabs in portfolio or team page.
I am working as a freelance website designer for more than 3 years, You can count upon my experience