If on a boxline.....4 per bin, EVERY bin. It really works (unless your pull totals north of 1100 pieces). Letters are included; afterall, they are included in your piece count.That being said (about letters and/or other "smalls"), focus on the bigger/heavier pieces early in your shift. Empties out bins and can allow you to have smoother time as morning goes on. Meet bins 3 ft in front of your work area.If your timing is thrown off and you should meet a bin in the middle of your work area, don't focus on it; rather, let it go and make up the pieces with other bins. For instance, take two extra from the next two bins, or one extra from the next four.Remember that this is a numbers game. If you are projected to have 800 pieces count on 850. Assuming you have 25 bins to pull in one standard revolution (20-21 mins) you should pull around 300 pieces an hour, perhaps more, when your bins are full. Don't care how bad your bins look in the beginning, do the 4 per bin and they will empty, unless it is north of 1150 piece count. If it is, and they are giving you a hard time, make sure they are giving you enough time to load. UPS asks for 224-230 pieces an hour; 4 per bin puts you north of 275 at least (depending upon the number of bins in a revolution. do the math. Have lots more, but 4 per bin is important......If you are on a belt.....never mastered the belt, but try to meet your pkgs well ahead of the work area