I have a 16 month gap between my two children. My son attended nursery for 3 days a week prior to his sister arriving and i kept him at that nursery for 2 days for the year following her birth until I returned to work. I felt this would be continuity for him and a bit of a break for me!
I found the hardest times were mealtimes and I tried to give him finger food so I did not have to bee spoon feeding him and well as sorting out the baby. But the bath/bed time. routine was particularly hard and is when I would have liked abit more help. My husband did not get home till after 8pm so was not much help then. The first 3 months were a struggle but many of us have 2 under 2 and we all get through it. My son watched more TV than I would have liked particularly when I was feeding. However my daughter became a very efficient feeder and could do a feed in 30mins when my son had always taken longer!
Good luck, it does get easier!