Slides and supporting material can be found here: http://gregsowell.com/?p=1290
I cover:
PPTP Client connections
IPSec -- Mikrotik to Mikrotik
IPSec -- Mikrotik to Mikrotik -- Multiple Subnets
IPSec -- Mikrotik to Mikrotik -- Private IP on WAN Interface
IPSec -- Mikrotik to Cisco Router
IPSec -- Mikrotik to Cisco ASA
IPSec -- Mikrotik to Cisco Router Multiple Subnets
IPIP Tunnel w/IPSec -- Mikrotik to Mikrotik
IPIP Tunnel w/IPSec -- Mikrotik to Cisco Router
DPD
Some basic troubleshooting