Website slowness

I am the admin of https://footballpursuits.com. i am having the following problems which gives me a low page load time. Please suggest me the solutions for the following issues i am facing(I got the problem from gtmetrix)

1)Specify image dimensions

2)Defer parsing of JavaScript

3)Remove query strings from static resources

4)Minify HTML

5)Add Expires headers

6)Make fewer HTTP requests

7)Compress components with gzip

8)Use a Content Delivery Network (CDN)

9)Use cookie-free domains

10)Reduce DNS lookups

Configure entity tags (ETags)