Today I realized how meditative lab work can be as well: I pipetted two times 81 small amounts of a DTT solution into Eppendorf tubes as the picture below shows. The actual amount was 5 microliters which can be pipetted with Eppendorf pipettes. These pipettes measure those tiny volumes astonishingly precisely! (as war as somebody told me down to 0.03 microl.!) For each tube you have to go back to your stock or temporary stock, load the pipette, get a new tube, unload the pipette, close the tube and repeat everything...

It's actually somehow fun and relaxing! After pipetting, I labeled all tubes... and I might have sore muscles tomorrow ;)