Copies from my posts in another thread
This means not just putting them in their and shutting the door the first time they see it. It will probably take a few days to a few weeks to get them to really love their crates. Never force your dog into the crate.
Personally I do it like this:-
Day 1) I would start with setting up the crates and letting the dogs sniff around them and rewarding your dogs with treats for their interest in the crates. That is it.
Day 2) Start with the same as day 1 and then maybe chuck some treats inside the crate so the dogs go in and eat and then come back out. That is it for day 2
Day 3) Repeat day 1 and 2 steps and then chuck into the crate a chicken neck or something similar which is higher value than normal treats but takes a little longer to eat and then let them walk out again. End of day 3
Day 4) Repeat previous steps and then while they are chewing on the chicken neck or similar item shut the door, just for 10 - 15 seconds and then open again and let them out.
From there you should just gradually increase the time the door is shut and gradually increase the value of the food you give them while they are in their crate. Do not start locking them for the night in until you can see they are very comfy inside. Ie: They will walk in and lay down or relax without any or too much guidance from you, if they are sitting/standing at the door then they are still anxious of being in the crate.
I would also suggest you start to play crate games (see below) with your dogs while you are gradually increasing their time in the crate, so they find it a fun place as well as a rewarding place to be.
Verbal rewards/attention are also a really important past of crate training, especially if you have a dog who is not super food motivated. So make sure you give loads of praise and pats for the dogs going into the crates.
I would highly recommend you buy the Susan Garrett crate games DVD
That is just a sample of how her crate games get dogs to really love the crate.
ETA - Feeding your dog dinner inside the crate when he is comfortable with it is also a great idea.