Hi guys. Just after some advice please.
I have a wordpress site and need to do a site redesign.
I have redesigned my site in photoshop and have the .psd file.

I do not want to change any content, posts, layout etc as my wordpress site is quite high up on google for my keywords and do not want this to have any effect on this.

What is the best option to go about redesigning my site? Am thinking of creating my site using html 5 also. Would this be beneficial?

Look forward to your advice and tips.

Thanks for reading.