The first and foremost thing is to optimise the images on the web. You should always use the save for the web feature that is included on an image editing software. Images actually represent a heavier load on a website hence optimising them is the best option. On the other hand, there are various online image optimisers that you can use.

Picking up the right format for the images is very important as it affects the speed of a website. The JPEG formats are suitable for photographs or various other true colour images. On the other hand, the GIF format should actually be used for flat colour images such as logos and buttons. Whereas PNG works almost like GIF but it actually supports more colours.

Another very important step is to optimise your CSS. You should always aggregate and clean the CSS. CleanCSS is actually an online tool which will actually merge some similar selectors. You can remove some useless properties and also remove the white space from the code.

Using a slash on your links because it will help in reducing the load time of the site. But you should add the slash at the end of the link.

Another very important step is to use the height and width tags. This option is generally forgotten. These tags will tell the browser about the size of the image. Hence the browser will actually reserve a spot for these images while it is loading the rest of the page which will eventually speed up the whole process.

Follow the above mentioned steps to speed up your website instantly. These steps are pretty easy and wont consume much time.