Step 1: First go searching. find yourself a big password list such as 300-500 (more if you really choose to)
 
Step 2: Make a giant combo list using those passwords you just found (1m-2m) (or more)
 
Step 3: Run your giant combo you made through a combo checker. (Sentry MBA or Others)(May take a while)
 
Step 4: When your combo is complete and you now have x amount of cracked accounts, take those accounts and run them on a account checker.
 
Step 5: Once all your accounts finished checking, sort  the accounts category by "passwords".
Try to use programs that support this function such as LoL checker Or SLC checker or whatever other programs you know of will work fine (:
 
Step 6: Take all the passwords that were used more then twice or more and make a new password list from those found passwords.
 
Step 7: All done, now you have successfully weeded out all the crappy passwords that take forever to get hits, and instead just use passwords
 with fast hits only (: Enjoy making your next combo with those instead.
 
RECAP: ( You can re-do this method over until you have an even smaller password list with only high hitting passwords )
( Also if using SQLi combos to find passwords instead, try picking out generic looking passwords to add to your password list
 (Ex. qwerasd123,john123,pokemon99)  just be smart about choosing them )