i have a 9 week old bub and she also has no real routine, especially not during the day. however i have found that letting her chose when she sleeps and for how long during the day does help her to sleep better at night. generally she has her last feed around 10pm, falling asleep around 11pm and sleeps until 7:30-8:30am, she then only wakes for a breakfast feed before sleeping til about 11am. then for the rest of the day she cat naps as she feels like it. the best part is i get to play with her and see so many smiles and beautiful times but the downside is somedays it makes it hard to get anything done. but i have tried a routine and it didnt suit her, yet for my 4 year old he ahd a set routine he stuck to by the minute. its my opinion that its whatever the bubs is comfortable with, and whatever your needs are of course but i wouldnt worry to much. my girlfriends little one had no routine until about 12 months and is now in a perfect routine which she seems happy to stick to...
basically its whatever suits the two of you.. each baby and family has their own needs..
good luck... and enjoy these precious times they only ome around once in a lifetime!!!
Renee, SA, 8 wk baby girl, 4 yr old boy