position in DDL of columns used in indexes

In other SQL engines that I've used, it is recommended that the columns that are used in various indexes be placed at the beginning of a row since at some point (depending on the engine and/or pagesize) wide rows could end up on other pages.  From a performance standpoint on large tables this makes a big difference.  Is the same true with Postgres.  Should I try and make sure that my indexes fit in the first 8192 bytes?

Bes Regards