Me and My International 384 Diesel Tractor Stuck in Gear

Yesterday while using my tractor to drag some brush to the burn pile, the tractor stuck in gear and would not go into any other gear. I could move the shifter into what appeared to be neutral and the tractor would move, when I moved the shifter into another gear it went dead and would not move. 

I tried moving the shifter to get this thing unstuck, but no luck.  It also would not go into reverse.  So what did I do?  Well I came inside and went to my computer and began to google for a tractor forum that would help me with my problem.  I was able to locate a forum where about ten other people who had the same problem, wrote in for help.
The solution was to remove the pin that holds the shifter onto the top of the housing and lift out the shifter and line up the three movable rails inside and put the shifter back on being careful to place the bottom piece of the shifter into the slot that was formed when the three rails were lined up.
After this the tractor worked fine.  I was also advised in the forum to not lift on the shifter when changing gears, but to move the shifter to neutral with the palm of my hand and then move the shifter to the gear that I wanted. 
I am now careful with my shifting. 
Bottom line, when a problem develops, before dragging your tractor to the shop go to a forum and see what fellow tractor owners did when they encountered the same problem. 
Later.