I keep it simple. Just send an email to tom[at]tincorporated[dot]com.
I'm fairly good at keeping up with my inbox and am usually able to respond within a few days. If you don't hear from me, I'm probably fine, just busy, so don't keep emailing. I'll respond. Promise.
I'm not currently taking on any more freelance work at this time but if you'd like to work with me look no further than Blue Flavor. It's my day job.