eFour inch (closed length) lockback Schrade on a lanyard in my right hand trousers pocket. Victorinox Spartan (pocket toolbox MacGyver knife) in a belt sheath on my left side.
I was recently given a small Buck lockback just under four inches closed with a pocket clip, so I have been experimenting with using a pocket clip. I tried clipping it to my right rear trousers pocket, but it worked loose and fell out onto the car seat several times - I thought it was lost. I have also experimented with clipping the knife to my right hand trousers pocket - this is comfortable and secure but the shiny clip is a clue that I have a knife and there is no lanyard to tie the knife to my belt or hang it from my neck. I am also experimenting with clipping the knife (tip up carry) inside the waistband of my trousers where it can be concealed by a belt. This s comfortable and secure, but a little bit slow to take the knife out; the inside the waistband carry seems best for a backup knife for me.