Tricks to manage the available memory in an R session

Question

What tricks do people use to manage the available memory of an interactive R session? I use the functions below [based on postings by Petr Pikal and David Hinds to the r-he

Answer 1

If you really want to avoid the leaks, you should avoid creating any big objects in the global environment.

What I usually do is to have a function that does the job and returns NULL — all data is read and manipulated in this function or others that it calls.