How I reduce my bounce rate on my website?

Hello Everyone please tell me how to reduce bounce rate on my site?
Actually, my website has a high bounce rate that's why My traffic day by day going decrease. what I do to reduce my website bounce rate. Give me some suggestion or If you want some changes for my website like content design or another thing. Please check my website.

Website - http://www.apptunix.com

Bounce rate is the percentage of visitors to a particular website who navigate away from the site after viewing only one page. It can be reduced by:

Good content update
Internal links
Easy navigation
Quick loading of webpage