Learn from my mistakes – always, always survey your working area before packing it in for the day.
Or else…this will happen:

Yup, gardening tools left outside to weather the elements will soon look like old pieces of junk.
Rusty hand shears with a dull blade certainly take all the joy out of pruning. Not only does it make cutting more difficult and time-consuming, the jagged cuts aren’t good for the plant either.

Smoothly snipping away is so much more satisfying and plants will appreciate a clean cut too. Straight cuts will heal faster and the wounds will better resist diseases and insects.
A good set of hand pruners are made to last a lifetime, so don’t chuck ‘em away. It’s really easy to restore a used and abused pair of shears back to nearly new condition.