What to do
FInd a source of material for Research
(my favorite is @JMtoWin's NFL Edge on Rotogrinder he breaks down every match-up) link----->>> https://rotogrinders.com/articles/jmtowin-s-nfl-edge-week-5-804648
Pay attention to the game break downs, strengths and weaknesses.
Target your games or matchups that make sense to you based on what you know, and have just learned.
Choose your contests.
Click only the games/matchups that you have targeted and eliminate the other games/matchups so you don't see players from those games as available to roster/choose.
Pick your players that fit within the parameters of all those things, ONLY.
If there is $salary left over, see if you can upgrade players at any positions you may have skipped due to Price. (But make sure those upgrades STILL are in the games you wanted to target)
When this lineup is set, keep it.
If you find yourself tinkering, make sure it's true improvement and not boredom tinkering.
If it's boredom tinkering, start a whole NEW lineup completely
What not to do
Look at rankings and predictions of players after your lineup is set, and then sub them in for players you chose with your hard research.