Don't worry, this isn't going to be one of those hardline posts declaring there are no excuses for not writing, that if you aren't writing then clearly you don't want it enough. You know the kind of thing "Well, I completed edits to my best selling novel whilst giving birth and navigating my way through the Sahara..."
Okay that's a little extreme but in reality not too far removed from some posts I've read. For mere mortals though there are going to be times when not inconsequential matters like ill health or family demands impact your writing. And unless you're happy to traumatise your kids by shutting them in a cupboard all day, well it's something you need to try and work round.
There are other barriers to our writing though and if we are utterly honest with ourselves sometimes we do make excuses. I'm not here to slap your wrist for that, if I did I'd be a complete hypocrite, but I am interested in WHY. Why do we delay finishing that manuscript or submitting our work? I think fear, in one form or another is to blame - fear that if we do submit and are rejected again we won't be able to cope with it.
Last night I was angsting about something non-writery and finally irritated myself so much I finally mumbled "Oh get over yourself and just get on with it."
I don't think it's a coincidence that some of the most successful writers I've met have an incredibly thick skin when it comes to rejections. They didn't waste time sitting angsting (and have little patience with mine!), they just got on it with it - kept writing and subbing, subbing, often with multiple submissions out there. And now they are reaping the rewards of their perseverance and resilient mental attitude.
So, although I don't profess to have the answers I do have a suggestion:
(1) Get over it.
(2) Get on with it.
and because I'm not a completely heartless cow:
(3) Good luck!