2% max recommended unless otherwise noted. 1% max recommended for soccer.
First, if you can, always shop for the best lines, which include the best "juice"; this includes getting a bet at +100 or -105 rather than -110.
Second, because my bets tend to be "against the public", you can often wait for lines better than when I initially post them. You can monitor where the public is trending here (https://www.wagertalk.com/freeOddsPage/page.html?sport=today&v=2.2) & here (https://www.vegasinsider.com/college-football/matchups/) & here (https://www.actionnetwork.com/nfl/public-betting) & here (https://www.thespread.com/nfl-football-public-betting-chart). I post them early so that you can be on the alert to get the best odds.
Third, per a popular question, I never change the amount of my betting base all year. If you are betting $100 per bet, I never change that all betting "season" for that particular sport. The reason is the luck factor -- frankly, you never know when it will break with you or against you, so putting too much at risk in just one part of the season for a sport is more risk than reward, from my perspective. Do note there are many bettors who disagree, and change their betting base depending on their bankroll size at any given time, but I don't happen to share that approach myself. As always, do as you wish.
Exit polls show it very, very close. They tend to be more accurate in the Netherlands. Hence, recommendation is to SELL both PVV & Global Right Sweep positions at current rates, which is around 40%; ok to sell to 15%. Wouldn't sell below that b/c close enough for a longshot.