Currently 31wks with DD2, DD1 is 16 months.
I agree with how quickly it's gone by 2nd time round. Someone asked me this morning how many weeks I am, I actually had to check an app on my phone
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After a 30hr labour first time round, I'm also praying for a shorter and less painful one this time!
Something I know differently this time - how much it frickin' hurt last time - and that I'm a complete wuss and definitely can't cope without proper pain-relief. After trying for 24 hours and finally begging asking for an epidural I know not to even bother trying without any pain-relief this time 
With regard to this actual pregnancy, I've found it much easier on my body this time round. Apart from feeling like a whale (bump isn't even that big, but seems to be higher up than I remember last time) - I had terrible back pain last time and was signed off work from 5 months, that's not kicked in yet and I'm sure my SPD had started well before this stage too.
I have found myself very tired this time, having a very active 16 month old I very rarely get chance to sit and relax, whereas last time I'm sure I slept most of the final 4 months after being signed off work!
Also know what to do differently after the baby is born, and what guidelines we won't be following 