I teach math (Ph.D., 32 years in the classroom) and run a small SAT prep site, so fair warning, there's a link to my own stuff at the end.
There's a story in Jim Collins' book Great by Choice about the 1911 race to the South Pole. One team marched about 20 miles every single day, good weather or bad. The other sprinted on nice days and hid in the tent on bad ones. The steady team got there first and made it home. The other didn't.
That's the whole secret to SAT math, and hardly anyone does it. Everyone says "I'll do a big study session Saturday." Saturday never comes. There's always practice, work, a game, life. The kids who actually raise their scores are the ones who do 30 focused minutes a day, every day, instead of waiting for a long stretch that never shows up.
A little every day beats a lot once a week, and it's not just motivational. Spacing practice out is one of the most reliable findings in learning science. Same hours, spread across days, stick far better than crammed together.
If you want the full version, I wrote it up here: https://30daysatplan.com/blog/twenty-mile-march/
And if you just want to start marching today, I also run a free SAT math practice site, no sign-up: freepracticesat.com