I was installing SQL server 2012 and I have to say it is not at all easy task. I got below issues and solutions:
Issue 1 - Not able to complete installation if you have visual studio 2012 / 2013 installed before.
Solution - make sure you install SQL server 2012 before installation of visual studio 2012 / 2013.
If you have installed visual studio, the simplest way is go for SQL server 2014.
Issue 2 - No separate SQL server management studio installation.
Solution - You need to start installation again and run installation again.
Some blog will tell you to go with add feature in installation. but you need to go new installation if you are go with 64 bit.
Recently I was working on sending mail using smtp server where I stuck on below error: IIS/SMTP - emails are stuck in mailroot/Queue ...
you will see this error when you try to add SharePoint Hosted app : Sorry, apps are turned off. If you know who runs the server, tell them...