(Greek mythology) Helen

(computing) header (the first part of a file or record that describes its contents) / (networking) header (the first part of a packet or stream)

(slang) person who likes hip-hop music

(Internet slang, hyperbolic) to enter a manic-depressive-like state

returning in the morning after a night away

through, by way of, after

the first sight of something / something seen for the first time

one should start a big project with immediate, practical steps; start small / the person who proposes something should be the first one to take practical steps to implement it

everything

(colloquial) current boyfriend