Replaced fluorescent fixtures in my kitchen with track lighting last week. Was a little more work than I thought since there were no wire boxes mounted above them to mount the track fixtures (the fluoros were each mounted with several screws directly into the ceiling

) so I had to cut holes in the ceiling to mount the boxes from below. Fun. Luckily, the hole where the wires were fed through from the attic were right next to a joist so I was able to mount the boxes fairly easily. At the end of the day, it got done and they look pretty good.
Today I had to replace the master bath sink faucet. Went to Lowes and picked one up along with a pair of 16"supply lines. Got home and realized that the lines were longer than I needed, so I measured from the fixture to the lines in the wall and it was 12 inches. So I took the 16 inchers back to Lowes and swapped them out for 12" lines. Got home and when I went to install them the damn things were about a half inch short. No way to make them work.

So, back to Lowes (3rd time today) and got the 16 inchers and finally got the job done.
What should have been about a 30 minute job turned into 2+ hours and 3 trips to Lowes.