i love teasers but most sites dont offer them. a teaser is a bet where you take two lines and get better odds for each, but both have to hit for you to win. a teaser adds 6.5 to the line.
for example, last week at game time jacksonville was +3 and detroit was +6. you could "tease" both games and get jacksonville at +9.5 and detroit +12.5. both have to win for you to win the best.
i bet on draft kings and they dont do teasers. instead, you can do an "alternative line" for each game. that allows you to bet at a different line and increase your odds of winning, but as you increase the line, your pay out goes way down. but if you bet three of those lines together, you can still get "ok" odds.
on my parlay i took atlanta at +8.5, san fran at +7.5, and jax at +14. all three had to hit (and they did!). but i was only getting +125 on the bet so i didnt win that much.
but i only bet $5 or $10 at a time. never lose very much but never win very much.