Try wet food. That's what my sister has used with the five stray kittys that are now her friendly pets.

Don't leave out milk. Milk can actually hurt little kitty tummys, especially if it's not watered down. The cat will appreciate the water though.

Try talking to the kitty. In really friendly voice, just talk to the kitty saying things like good kitty, nice kitty. Tell it anything, just keep your voice friendly and appealing.

Also, the last time I was helping rescue a stray kitty, someone told me to meow to it. I tried this and it worked really well! (Of course it convinced my neighbors that I was, in fact, a loon as I was meowing outside in my jammies at two in the morning....but the kitty enjoyed it!)

Hold out your hand to it so it can sniff you before you pet it. It'll want to know who you are and where you've been.

Try making it a cat bed it can sleep in. Truly, this never worked with my strays but perhaps you'll have better luck. Covering a box with plastic for insulation (leave a cat flap so kitty can come in and out) and place some straw in the bottom of it. Hopefully it'll sleep where you know it'll be warm until you can bring it inside.

If worst comes to worst, you can always buy a small trap at your local farm and feed store. My sister bought one and set food and water inside of it to lure the kitty in. She found out it worked well pretty quickly. She caught one of her own kitties...twice!

If you do trap the kitty, bring it inside and leave him in the cage for a few days, in a room where no other animal can get to it. After a few days, when the kitty is more tame, try letting it out but only in that room.

Good luck! I hope that helps; I've not had very much experience with strays but my sister has caught five and now they're her loving little furry monsters. Those are some of the tricks she used and they seemed to work pretty well for her.

Let us know how it turns out.