Elph, DD1 has dropped her nap too. However, in a few short weeks we seem to have gone from it being vital that DD1 has at least an hour and a half otherwise all hell breaks loose to it being vital that she doesn't sleep at all during the day otherwise she's up till 10 o'bloody clock. I have gone to bed before her on several occasions. Car journeys are therefore very tricky - she slept for 20 minutes today on the way home from a monster day out - birthday party with bouncy castles, lunch with lots of friends and their kids, decent length walk. She's now bouncing around her bedroom loudly playing and giggling at her toys...
Own bedroom is still not making any difference to DD2's sleep either. She was up from 11.30 till 12.30 and 2 am till 4 am last night. Think it might have been teeth as she finally settled after Calpol. Then up at 5.30 for a feed, then DD1 woke screaming for the second time so ended up in our bed at 6. Its frustrating because I know DD2 can actually do a decent stretch. Its just never when I have the chance to be asleep as well!
Solids? Pah, DD2 is a monster eater. She eats way more than DD1 at that age, and a fair bit more than DD1 eats now. Does it make a difference? Does it heck! Just like rolling, crawling, walking, talking, going to baby groups, childminder, fresh air, cutting naps, extra naps and just about every other bastard thing that people have told me will definitely make a difference to their sleep...
Attitude and Raspberry, I can't remember exactly when DD1 went to 1 nap, but I do remember doing everything to get her to sleep for a decent length of time, including lying next to her cot and shushing and back rubbing/hand-holding etc every time she moved an inch. After a few weeks she settled into a longer nap but not at bloody night time sadly. DD2 has generally been a better napper from the start. She has just turned 1 and some days has 1 nap, and other days 2. She generally likes a lie-in till 7.30/8 so usually has snack at 11, then sleep at 11.30, lunch after nap at 1.30. If she's cranky in the afternoon, she might have another sleep at 4 - 4.30 ish for 45 minutes or so. Its best if she's up by 5 or not long after for an 8pm bedtime.
That was the pattern I followed with DD1 until she dropped her nap recently. I found that gave us time to do something briefly in the morning like a class (as long as it didn't run too late as if DD1 fell asleep in the car, she couldn't be transferred to a cot. When she got to 2 I was usually able to put her in the pushchair and walk around the drive briskly for a bit then she would stay asleep), but meant that we had a reasonable length afternoon to go and do stuff like meet friends or go to the park.
Right, I'm ignoring the vast pile of washing demanding my attention and going to bed!
Good luck all!