I recently optimized all my blogs which were painfully slow to load. I even wrote it on the blog that how I increased my blog’s loading speed by 500 percent. I used several techniques which I have shared in that article.
One tool that helped me improve my blog loading time was Google Page speed, which is a small web tool offered by Google for webmasters so that they can optimize their website according to the instructions given by Google.

Just head over to Google Page Speed tool page and put the website you want to improve. The tool analyses your blog’s current performance and suggest you some guidelines and instructions which can help you improve the speed of your blog drastically as it did in my case.
I simply followed all the suggestions made by Google Page speed. And was able to get my blog’ loading time from 8 second to 1 second.
Google categorizes the suggestions into four categories,
1) High Priority: These suggestions represent the largest potential performance wins for the least development effort. You should address these items first:
2) Medium Priority: These suggestions may represent smaller wins or much more work to implement. You should address these items next:
3) Low Priority: These suggestions represent the smallest wins. You should only be concerned with these items after you’ve handled the higher-priority ones
4) Experimental: These suggestions are experimental, but do not affect the overall PageSpeed score. Consider these items as points to an area to explore, but your mileage might vary:
According to Google, the speed of a webpage is also one of the 200 parameters that are counted to rank a page in search engines. This means, you are really serious about your Search engine rankings, and then you must take action to improve your blog’s speed.