picking up trash;  collecting garbage
 a find;  windfall;  bargain
 reading (the parts one is interested in);  reading here and there;  skimming through;  reading word by word;  reading only the parts one can understand
 fetching balls (tennis, baseball, etc.);  ball boy
 fetching balls (tennis, baseball, etc.);  ball boy
 gleaning (i.e. picking up crop left after harvesting)
 gathering up the ashes of the deceased
 finder (of lost property)
 (a) wander;  amble;  walking on the good part of a street (to avoid puddles, etc.)
 walking on the good part of a street (to avoid puddles, etc.)
 picking up stitches (knitting)
 gathering cigarette butts;  person gathering cigarette butts
 image found on the Internet (as opposed to created by oneself)