We borrowed a crate from a friend. tbh I was a bit dubious at the start but made it very cosy and put a blanket over it so it was very much a den as minimu says rather than a cage.
I gated off the kitchen and made sure the only nice warm area to lie on in the kitchen was her crate. When I got her home on the first day i put treats in it throughout the day so by the evening she was popping in and out of it the whole time quite happily to check if there was food in there.
Now I have to admit the first night I didn't shut the door, but that's because I'm a bit of a wuss and I slept downstairs on the sofa bed in the kitchen. She slept the whole night in the crate with the door open so the next night I shut it.
I wasn't as brave as minimu and for the first few weeks I got up in the night to let her out for a wee. However after a communications breakdown wih dh I came down at the normal time in the morning, no wees or poos in the crate and only discovered later that neither of us had let her out since 10pm the night before....after that I didn't get up in the night
Crate training in the day took a bit longer as she howled and barked if I put her in there if I needed to go out. I did lots of ignoring, esp when you first come into the room (I always put the kettle on and pottered about without looking at her). When she stopped making a fuss and clamed down then I'd let her out.
She's 13 weeks now and grew to big for the small crate so I'm now using the dd's old play pen and that has a basket in it and a blanket on the rest of the floor. She loves it (is in there now having a nap). It's great to know when I'm out she is safe and cosy and not roaming around the kitchen chewing on the kitchen cupboards.
I've also clicker trained her an 'in your bed' command. Hilarious as she literally RACES into the pen and leaps into her bed.
There are a few clicker threads in the pet section. minimu is the clicker guru. BRILLIANT bit of kit for dog training. I highly recommend getting one and a clicker training book.
We heart our clicker.