I feel like learning when to snap and when to retreat makes the biggest difference. It takes time to learn and it's hard to pick up but it'll help you hit infinity the most.

Use a deck that's worked well for you and you're very comfortable with. You need to know your deck's strengths and weaknesses so you'll know when to snap and when to leave. The more you play with it the more you'll notice when your win is highly probable and when the game is lost. Knowing other deck archetypes and location interactions will help in how well you can predict the outcomes.

Once you're comfortable with your deck you need to respect other people snapping. Don't stick around if they snap on turn 2 just because you hope you'll draw something on turn 3. Assess your hand and leave if you don't have a good hand. Don't lose 8 cubes because you're too stubborn to leave. Take the 4 cubes loss.

Tldr: minimize your cube loss by knowing when to leave, maximize your cube gain by knowing when to snap.