One more advice from someone with used-to-have-excellent-memory: remember how to find good examples:

perldoc perl
[download]

and the derivatives that are listed there: perldoc perlre, perldoc perlcheat, perldoc perldsc, etc.

If you use that often enough you'll remember where examples are that you cannot remember.

(Personally, I also keep files with the most often needed/forgotten examples, one for each language: bash, perl, sql, etc. Then, make sure they are accessible; now and then mail them to yourself, for instance).

Yeah, it's rough to get older... (and I can tell you it gets worse, not better ;-))

But it's also true that using your brain keeps it in better shape, and surely learning perl qualifies.

More:

Perl documentation documentation