(!empty($user->lang['QUOTE'])) ? $user->lang['QUOTE'] : ucwords(strtolower(str_replace('_', ' ', 'QUOTE'))):
Insta's are really usefull for more than just gate travel.
Insta-dock = BM a location either very near the center of a station to have an Instant ability to dock. somestations are harder to Insta dock than most.
Safepoint = VERY VERY usefull in low Sec. space. You see a pirate(NPC and PC) enter the same space you can jump to that location to greatly improve your chances of survival. You make safe points by draining your CAP and making an incomplete warp. BM that location and its literally your own little haven. (untill someone with scan probes shows up)
Insta-Hualing = simpling just making BM that places 12KM inbetween the BM and the can/miner and lines up with the station of your choice.
Hell you can even BM a region and sell it for 14Million ISK on escrew.
To address your safepoint comment, this is incorrect you do not need to drain your cap.
Simply open people & places > places tab, go into warp tords some random thing ( planet//belt//whatever ) and while in warp ( maby halfway through or w/e ) hit the bookmark button in the places tab and it will bring up a window with a name thing and all that and hit ok and your safespot is made.