Your scissors should always be sharpened and ready to rock. Even scissors that are dull in places will usually have a ‘sweet spot’ toward the middle of the blade. You can still use scissors in this condition to cut like butter through longer lengths of fabric. For those little cuts and snips, however, you’re going to need a freshly sharpened pair.
Scissors that stay sharp for a long time can be found at your local craft store, but a pair from the grocery with work. The best way to get the most use out of your scissors is to have two pairs. Use one pair for fabrics and the other pair for everything else.
Of course, fingers should be clear of the blade while cutting. Be sure to dry scissors off after wet use to prevent rust, and store them in a cool dry place. Never be tempted to use them as kitchen scissors!