In order to build an effective watch-list, I collect a handful of leadership and / or liquidity stocks in the hot sectors (e.g., software, semiconductors, etc) as well as those that gap up on earnings (PEAD candidates). Stocks that I select for my watch-list should meet general technical criteria matching my trading approach (e.g., minimum daily volume, price action, etc). My watch-list usually comprises ~100 names. I review each stock on a daily basis and set my ThinkorSwim alert notifications.
Here is the list of top stocks on my watch-list right now: