Time management proportion

Time management has always been  my weakest point .

Im kind of a perfectionist and an artist.It really pays of sometimes as I get tactical knockouts most of the time.I like long thinks,always trying to work things out and not miss anything.When I make a practical move whithout thinking it all out,I feel uncomfortable.Maybe it's like an Obsessive Compulsive Disorder.

So anyway,I want to ask you guys what's a good proportion of time use?Because losing on time in a winning position sucks.

What i mean is for example,say in a 100 minute game

opening-10% of time use

middlegame-60% of time use

endgames-30% of time use

Is that good enough?

Other strategies in time management also much appreciated