dosen't it also depend on culture?
I was 31 before I got married and had know my husband for 6 1/2 years. We had a daughter of 1 1/2 when we got married.
Still happily married after 7 years..
Think of the user experience - go to websites, you think work - and include the best from them in your site:
Consider:
Steps in the basket
Dropdown menus or not
Filtration/segmentation of different categories
Call to action buttons
It´s a must to have a responsive web design, as more and more see your website from mobile or tablet. When it is responsive it adjusts to the device you are on - so you can still see all images and links correct and do not have to scroll or swipe to see the whole page
if you have a webshop and one of your products are sold out and this site then "dies", then you can use 301-redirect to lead the customer to a similar product or to the main category