I use a program called Super Backup for that. It can take a backup of your contacts to a standard .vcf file. You just transfer the file to the new device then restore them with the same program.
It also supports backups of installed programs, SMSs, bookmarks, among others.
My Computer
At a glance
Windows 7 Ultimate x64Intel Core i7-740QM8 GB DDR3NVIDIA GeForce 330GT
Computer type
Laptop
Computer Manufacturer/Model Number
Toshiba Sattelite A665-S6092
OS
Windows 7 Ultimate x64
CPU
Intel Core i7-740QM
Memory
8 GB DDR3
Graphics Card(s)
NVIDIA GeForce 330GT
Screen Resolution
1366x768
Hard Drives
Samsung 840 SSD 500GB
1TB USB3 external HD
Cooling
Coolermaster Notepal U3 notebook cooling pad
Internet Speed
3mbps ASDL
Antivirus
ClamWin 0.98.7
Browser
Opera 12.17 x86 (main), Firefox 38 (sec), IE11 (last resort)