Can you share some of your more generally useful gdb settings / macros?

I've been working with linux/gdb for years and while I do agree it is powerful -- I don't find it very convenient.

For example, up until gdb 7.4 (pretty recent) there was no way to automatically skip certain functions -- the 'skip' command added to gdb 7.4 is almost a must for debugging heavy C++ code (and you still cannot add it to your .gdbrc file...)