I try to follow patterns, like if players have tendencies to do certain things in certain situations and if the odds give value vs the expected likelihood of a trend continuing. I watch some matches in play but in the past haven't been able to read it well, so having something statistical to use or test has been a bit more successful.
And patterns in how the odds move as well, and how the odds movements can repeat themselves, that's more for betfair/matchbook/smarkets trading though. I have an ebook I bought on that - my discord is my location tag, if you want more info on what that book is and where to get it.

It's sort of funny that the above correct "predictions" won but I didn't place bets on them. Jack Sock won, I have no excuse but the Nishikori match was in play while I was at work, so obviously can't really bet while at work, except lunch time or something on my phone.

Hopefully will get to watch Kei Nishikori today and see if a similar opportunity arises.

I guess overall I am a fan of certain teams in certain sports, so would be more aware of when they are playing. Like Jack Sock in tennis or Clare Hurling in Ireland (Irish Sport). But overall I am indifferent about what I bet on, I think it is easier to be more rational when you don't want a team to win based on liking the team, you can be more objective on it.

Would you follow certain teams for the sports you bet on and/or watch?