drop to 100 and do more reps, then build up again.
everyone hits a plateau now and then, the key is not just trying to force yourself through it.
what many people do is something like
1rm=150kg
week 1 : work up to 110kg
week 2 : work up to 120kg
week 3 : work up to 130kg
week 4 : work up to 140kg
week 5 : work up to 150kg
week 6 : work up to 155kg
week 7 : rest
week 8 : work up to 115kg
week 9 : work up to 125kg
etc etc
Me and my house mate who's just moved back in, like the sound of that Morba
week 1 : 10x10 work up to 120kg
week 2 : 10x10 work up to 130kg
week 3 : 10x10 work up to 140kg
week 4 : 10x10 work up to 150kg
week 5 : 10x10 work up to 155kg
week 6 : 10x10 work up to 160kg
week 7 : 10x10 work up to 165kg
week 8 : 10x10 work up to 170kg
week 9 : 10x10 work up to 175kg
and so on............