Hammer in the half **** position with the safety on. When you get situated in your stand it's still safe to push the safety off, just remember to put it back on if you pull the hammer back but don't get a shot. It's a great feature in case the hammer slips from your thumb. Always remember to put the safety on when you unload the rifle. A lot of guys don't like the safety, but it's the best way to prevent an accidental discharge while unloading the gun by racking the shells out.
On the checkering I use any of the oil finishes, mixed 50/50 with mineral spirits. Whatever you might already have will work. True oil, tung oil, linseed oil etc..