Chris Taylor

Use the Really Simple SSL plugin to move your wordpress site over to SSL.

This is the code that is added to your htaccess file to force the 301 redirects.

# BEGIN rlrssslReallySimpleSSL rsssl_version[2.5.20]

<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{HTTPS} !=on [NC]
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
</IfModule>

# END rlrssslReallySimpleSSL

More useful advice from the folks at Buffer:

In general, here are the best sizes for sharing images on social media. 

Facebook – 1,200 x 628

Twitter – 1,024 x 576

Instagram – 1,080 x 1,080

LinkedIn – 552 x 368

Pinterest – 600 x 900

Google+ – 800 x 320

And here is "the Essential Social Media Design & Sizing Cheat Sheet" from omnicore: