Does my Computer have enough Ram/Memory?
When it comes to Ram/Memory in a computer a big thing to remember is what the computer is being used for. Someone who is only using it to browse the web and watch Youtube will need alot less than someone who is multitasking or gaming. If its just a basic web browsing computer anywhere from 4-8 gigabytes of ram is plenty. Most people doing extreme multitasking or gaming are going to want 16+ gigabytes of ram. Adding more ram will not create any noticeable difference in speed unless you are utilizing your max amount.

What is one of the best ways to speed up my PC?
Computers commonly have what is called a mechanical drive which uses moving parts internally. Due to these mechanical factors speed becomes limited. New technology has allowed for the creation of a solid state drive which removes the limitation of moving parts. With a Solid State Drive (SSD) you will notice a massive improvement over a standard mechanical hard drive.