Collocations for handy - adj.

be
come in
I advise you to buy one—it may come in handy one day.

extremely, really, very
quite

for
The arrangement was handy for both of us.

be
have sth
keep sth
Always keep a cloth handy to wipe up any mess.

quite, very (both BrE)

for (BrE)
My new house is very handy for the station.

be

extremely, fairly, very, etc.

at
‘I'm pretty handy at giving out advice,’ claimed Mark.

with
Lucy is very handy with a drill.

Handy is used with these nouns:
excuse, feature, gadget, guide, hint, reference, size, tip, tool, trick