Don't recompute sort keys inside a sort. [Sorting ]
Use reverse to reverse a list. [Reversing Lists ]
Use scalar reverse to reverse a scalar. [Reversing Scalars ]
Use unpack to extract fixed-width fields. [Fixed-Width Data ]
Use split to extract simple variable-width fields. [Separated Data ]
Use Text::CSV_XS to extract complex variable-width fields. [Variable-Width Data ]
Avoid string eval. [String Evaluations ]
Consider building your sorting routines with Sort::Maker. [Automating Sorts ]
Use 4-arg substr instead of lvalue substr. [Substrings ]
Make appropriate use of lvalue values. [Hash Values ]
Use glob, not <...>. [Globbing ]
Avoid a raw select for non-integer sleeps. [Sleeping ]
Always use a block with a map and grep. [Mapping and Grepping ]
Use the "non-builtin builtins". [Utilities ]