Here's another suggestion in addition to what has already been mentioned. If you go to the Stihl web site and look in the video section, there is a set of short videos there on basic chainsaw techniques. They have some good examples of cutting logs in these different types of tension/compression scenarios. You might want to check those out too. It's always easier to figure out when you can see someone do it.
It's definitely worth having a couple plastic wedges with you. You can make some wood ones on site if necessary. A rock or chunk of wood can drive them if you don't have an axe or hammer.
Before cutting anything, think through the stresses. Figure out which side is in tension, which side is in compression, and cut accordingly. Watch out for the cut pieces rolling (stay uphill), sliding, or uprighting.
It's definitely worth having a couple plastic wedges with you. You can make some wood ones on site if necessary. A rock or chunk of wood can drive them if you don't have an axe or hammer.
Before cutting anything, think through the stresses. Figure out which side is in tension, which side is in compression, and cut accordingly. Watch out for the cut pieces rolling (stay uphill), sliding, or uprighting.