make a budget of all your necessities and transfer the rest into an online savings account, as mentioned above. here's an example of mine

-400 monthly rent
-90 bridge tolls
-110 gas
-50 cell phone
-250 food
-200 misc shit

monthly expenses add up to 1100. any money i make above my expenses automatically get immediately transferred into a savings account.

last year, i didn't make a budget and saved 0 the entire year. this year, sticking to my budget, i've already saved $4400 and it's only february.