I went out today on a lake that has ALOT of wood in the 15-25 foot range and have marked fish on these timber. I fished shallow for 3 hours throwing everything. then i go deep with a crank, and a drop shot and a c-rig and a little bit with the jig. just got hung-up and thats it.  What are some of the best techniques for fishing these deep timber. I was puzzled today.

Hands down, the metal jigging spoon.   ???  Puzzled?

A lot of people do not use these anymore.  However, if you get the weedless versions, you will be able to get it down there, and will be able to knock the fish upside their heads.  

Other than that, I would go with bright colored soft plastics, on a T-rig.

Don't know how well the T-rig works for you but down here it works well.I usually will use up to a 1/2 ounce sinker in that deep of water.That or shorten up your leader on the C-rig.Hope this helps.Another thing I keep in mind is to always work slow atleast to start out.

A week or so ago we were haveing pretty good luck with tubes, and several different things on a C-Rigs even though we did get hung up from time to time in conditions like you had. With the C-rig we tried to work the channels and edges and grass lines if we could and did have to drop the size of the weight to about 3/8 or 5/16 fished slow and let them slither over the branches . Most of the strikes were almost undetectable once you got around 30'. Flukes, Hoo Daddy's and bushhogs worked the best for us. What worked one day didn't always seem too the next.

I Texas rig plastics and pop the bottom dredging each side of the trunk...... if they're under there they'll take a run at it!

Just remember to fish vertical. You will hang up less. When I use a jigging spoon in deep wood I like to use a light wire hook because if it snags I can straighten my hook and get it back. Jigs, tubes, plastic worms, and jighead worms work great but like I said vertical presentation is the way to go. Your going to get snagged and loose stuff thats just part of the deal.

I'm with Chris. My Secret Pond is littered with timber, even in the middle of the main arm. I have had good luck with most soft plastics, but right now the Gitzit (tubes), T-rigged, are most productive. #2 is the Yamamoto Kut-Tail, also T-rigged.

I'm fishing deep, slow and vertical (short casts).

Yep, our Truman Lake and Mark Twain are very similar. Jigs and texas rigged worms work well. Sometimes a slow fall works best with the lighter weight or even weightless but few have the patience or desire. Many times, the heavy weight and fast fall work better. As was previously noted, vertical presentation is important. YOu have to work close to get the worm to continue to fall to the bottom. Once you have found the preferred depth of the active fish, you can nail down your presentation. Sometimes a shallow crank works well when they are positioned in the upper level of the water column. Other times the venerable DD22 works well banging through those limbs. If you throw cranks it's best to use a highly buoyant model so when it does bang into a limb you can stop your retrieve and let it float up a bit prior to resuming your retrieve. often this is when the fish will hit. On Table Rock, where we have trees in depths considerably deeper, the jigging spoon or the football head jigs perform well. Again, the vertical presentation is a must!