Retired for 20 years and trade stocks as my sole source of income since I retired. I started my professional career as a Veterinarian, but most of my working life was in R & D in electronics, computers (hardware and software) and finally as Chief Technical Officer for a small publicly traded tech company. Initially I traded tech stock, commodities and the precious metals but I will trade most ETFs and stocks via options if I can get the right initial setup. In recent years I have been increasingly trading various option combinations and selling puts. I mainly trade using covered calls, diagonal call combos, long synthetics (and risk reversals) and cash covered puts. I am not adverse to quick turnover speculative trades it the risk minimal. I normally have 50 to 100 open positions at any time and use my own excel spreadsheets to monitor them in real time.