Rifle cleaning and maintenance. No matter how well you can shoot, it won't do you much good it your rifle doesn't work, or you've ruined the barrel through improper cleaning. Some people buy new rifles and get an owner's manual with the rifle. Many of us (me included) aren't in the habit of buying new rifles for one reason or another. For those of us who bought a nice used rifle here's a couple of videos I found. Looking for more but this is a start. Click on the link and it will take you to the video's:
disassembly, cleaning and reassembly of a Ruger 10/22 magazine - http://www.youtube.com/watch?v=ek4_iFVoKdo
field stripping a Ruger 10/22 - http://www.youtube.com/watch?v=YhUwuW5qQvs&mode=related&search=
reassembly of a Ruger 10/22 - http://www.youtube.com/watch?v=q2G7_93PXoM&mode=related&search=
SKS disassembly and reassembly - http://www.youtube.com/watch?v=W2Xck4WtlZc
AK47 field strip - http://www.youtube.com/watch?v=8qXCb0TFtHc
M1 Garand field strip - http://www.youtube.com/watch?v=x4v6ptrjeHE
In case you want something to "shoot" for here's a video of a 14 year old field stripping and then reassembling an M1 Garand in 1 minute and 54 seconds = while blindfolded - http://www.youtube.com/watch?v=bX7ADJ6UGsQ
A pretty detailed description of field stripping and reassembly of an AR15 - http://www.youtube.com/watch?v=btewvXGw8F0&mode=related&search=
Here's one of a 12 year old field stripping and reassembling an AR15 in 1 minute and 14 seconds - http://www.youtube.com/watch?v=mVlRdYbD07A&mode=related&search=