lose the plot
take one's eye off the ball
distance
contemplate one's navel
self-serving
when you're up to your neck in alligators, it's hard to remember that your initial objective was to drain the swamp
straw man
stick to one's text
fence-sitting
look off
moony
above oneself
self-abnegation
potter
calculating
sit on one's hands
selflessly
tunnel vision
lost to the world
take the wind out of someone's sails
wander
make a better door than a window
overfocus
lose the thread
pretentiously
accismus
counter-intention
absentness
play dumb
stalking horse
self-forgetful
whoosh
bleh
absence
punt
shit or get off the pot
uninterest
centration
put aside
distractionism
hang upon
asleep at the switch
slum
underplay
get ahead of oneself
flaker
point-of-viewlessness
falter
tenuki
in another world
tergiversation
brain fart
focuslessness
lose it
in a world of one's own
in one's own world
ignoral
in one's own little world
prejudice
detraction
mental reservation
reservation
conflict
deny oneself
self-renunciation
ostrichism
turn to
abnegation
bat away
arriere pensee
downplaying
denial
preconception
bias
backpedaling
self-denial
monomania
frustration
divestiture
inconsideration
play fast and loose
set one's sights
thwarting
foiling
self-defeating
dismissal
disinterest
self-abnegatory
catch someone napping
appointment
compartmentalization
misattend
disregard
forget oneself
unseemliness
withdraw
get one's wires crossed
absently
drift off