  Applications of configuration mixing methods for nuclei near the proton and
neutron drip lines are discussed. A short review of magic numbers is presented.
Prospects for advances in the regions of four new "outposts" are highlighted:
$^{28}$O, $^{42}$Si, $^{60}$Ca and $^{78}$Ni. Topics include: shell gaps,
single-particle properties, islands-of-inversion, collectivity, neutron decay,
neutron halos, two-proton decay, effective charge, and quenching in knockout
reactions.
