I've had a university assigment using a pic and had a bit of a trouble to find an easy way to program and simulate for the 16F628A.
So I made this small video tutorial using Mikrobasic, Proteus and MPLAB.
You'll need this:
MikroBasic - http://www.mikroe.com/eng/products/view/9/mikrobasic-pro-for-pic/
ISIS - http://www.labcenter.com/download/prodemo_download.cfm
The program will light a led when a Switch is turned on.
Hope this will help others to start using microchip microprocessors.
https://www.youtube.com/watch?v=TBuQvuL2uN0