Welcome to WebmasterWorld Guest from 188.8.131.52
Selecting the form to use is the hard part. There are hundreds available, all with some minor modification or feature. Some better with security, some not. Two that I like: form2mail at [web4future.com...] (free) and "simple contact form" at [karlcore.com...] ($5). I like the flexiblity on the data input more on form2mail, while I like the validation and security more on the "simple contact form."
Either of these will do the job.