Find passwords with space sign at the end:
sh run | i _$
Show "router bgp/eigrp/ospf/rip" section of the configuration:
sh run | s r b
sh run | s r e
sh run | s r o
sh run | s r r
Show interface config only:
sh run | s int
Note: you can't use sh ru | s i because "i" in this case means "section include", also as "e" means "exclude"
Use short and informative route-map names, for example:
route-m c2e
to describe route-map for redistribution from connected to EIGRP.
Searching route in all VRFs:
sh ip ro vrf * | i ...
Show "crypto" part of the configuration (everything about IPSec):
sh run | s ^cr
or
sh run | s cry
Show routing part of the configuration with route-maps and without route-maps(longer and less used):
sh run | s ^r
sh run | s router
Less used, but valuable.
Show all ip prefix lists:
sh run | s ip p
Show all ip access-lists:
sh run | s ip ac
Note: I'm using sh run instead of sh ru because there is show rudpv1 command also exists.