I do timber stand improvement work for a living (meager at best). It's physically demanding, spooky dangerous, and is extremely subjective. What are your goals? Oak regeneration (good luck), croptree release, site prep for planting? Ever since I lucked into 70 acres in northeast Iowa, I've become much less ruthless on clients' properties. I learned the "art" by reading everything I could find remotely related to forest management practices. I also spent as much time as I could bugging a couple of respected DNR Foresters with countless questions. Attending workshops can be a great benefit as well as you get a chance to "compare notes" with other landowners. I will suggest that you contact your local DNR Forester and quiz him/her about related material they may have or direct you to. They will also walk your woods with you and develop a forest stewardship plan with your goals in mind. However, nothing can replace monitoring the efforts you've put in with your chainsaw, Tordon and your choice of pain relieving substance. It's also been my experience that after a day or two into a project and one to many close calls, landowners find it easier to call one of the fools like me to take over.