Time to sleep.

In her wrap me up at nap time

Bounce Bounce with daddy.

I think that we have been lucky with Imogen. At four months she is a pretty good little sleeper, she does have her off days or nights but on the most part she sleeps from 7 or 8pm - 5 or 6am, and has 3-4 naps in a day.
To assist with sleep we.

Use the wrap me ups, the little swaddles with zips you can buy. I have found this really helps me during the day, when she gets really sleepy the arms and legs just go everywhere, the wrap me up seems to help with that.

She has a "sleep sheep" its this random sheep that makes whale noices, I think she is beginning to associate this with nap time.

We have a big blue exercise ball (OK two, one in the lounge and one in our bedroom) used to bounce little miss to sleep (has always worked well for us).

Rocking her back and forth in her cot or pram works ok too.