When all is well, the mother should allow the baby to finish feeding on the first side, then if the baby wants more — offer the other side. (thebreastfeedingcenterofchicago.com)
It is good to finish each feeding with just one breast, and then save the other breast for the next feeding. (momwoot.com)
If you've just finished feeding your baby, but they are still fussy afterwards, it may mean that they need more to eat. (romper.com)