so i will run a screener (one for call potentials, one for put potentials) that are heavily based on CANSLIM -> increased sales qtr over qtr, EPS growth, above MA, etc...and essentially reverse of that when looking for something to buy puts...negative growth, earnings, etc...
after that i look at the chart (usually just daily), I like to see big volume days green for call potentials, and red for put potentials, trending direction, etc...
Then i look at the options and try see which ones give the best value IMO...and i do this by price difference per strike vs strike difference....hard for me to explain but IMO paying an extra $0.75 to get me $5 closer to ITM/better delta im going to pay it.
Then I take a small position (1-3% of my account), and will only increase my position size if it is good to me.
The adding to winners method i think needs to be eliminated or i need to alter it in some way because I lose money doing this more than gain.
Since you asked for some examples
An example of a trade gone right recently: $CLX -> met all of my requirements for a potential short...bought 5 put contracts for a total of $1,290 on 2/19 sold for a total of $1,925 (+$635) on 3/1.
An example of a trade gone bad recently: $MJ -> bought 2 contracts on 2/8...they immediately showed a good profit so I added one more contract on 2/9...it went against me and i ended up selling 2/23 for a loss of $464.