How to increase my website pagespeed upto 100 ?

I am currently optimizing my website for seo. I do not have budget to hire a developer so doing everything myself. I wanted to increase to increase my page speed up to 100. How can i resolve below errors ?

1)
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 1 blocking script resources and 1 blocking CSS resources. This causes a delay in rendering your page.

None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.
Remove render-blocking JavaScript:

https://www.socialmediatechtips.com/…IH8mS2vm7gqSFwzTkVAbNogeyro3j4F1mH8gE.js

Optimize CSS Delivery of the following:

https://www.socialmediatechtips.com/…mB5SqFprOLL2AvFsktQfDacYj7AXcAd_7wBQ.css

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2) Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:

https://www.socialmediatechtips.com/…themes/vantage/images/sprites-1-1-10.png (expiration not specified)
https://www.socialmediatechtips.com/…t/uploads/2013/12/Productive-Blogger.jpg (expiration not specified)

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3) Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 44.5KiB (14% reduction).
Losslessly compressing https://www.socialmediatechtips.com/…nt/uploads/2014/02/Socia-Media-Icons.jpg could save 24.2KiB (16% reduction).
Losslessly compressing https://www.socialmediatechtips.com/wp-content/uploads/2014/02/white.jpg could save 12.8KiB (69% reduction).
Losslessly compressing https://www.socialmediatechtips.com/…loads/2013/12/Twitter-for-businesses.png could save 3.9KiB (13% reduction).
Losslessly compressing https://www.socialmediatechtips.com/…/uploads/2014/02/Social-Media-Impact.jpg could save 2.5KiB (7% reduction).
Losslessly compressing https://www.socialmediatechtips.com/…ntent/uploads/2014/02/Gaming-272×182.jpg could save 579B (5% reduction).
Losslessly compressing https://www.socialmediatechtips.com/…t/uploads/2013/12/Productive-Blogger.jpg could save 578B (1% reduction).