My company just went through this. There are several ways you can approach the problem:
1. Find a mentor. Who's the biggest kahuna in your space? Reach out to him or to her. Don't ask for money or intros to VCs. Just pose a good question and start a conversation. Experts love to be heard (how else does Clarity work? :). Use that. If you're interesting and you have a great product, they'll approach you about finding.
2. Attend (and win) some pitch competitions like TC Disrupt. This is a toughie, but if you can cut it there, you can cut it anywhere. Note that good pitches do not necessarily convert to good product (hello, "Yo."). Even if you don't win, some VCs will see you and may approach.
3. Get into an incubator. Y combinator, hub:raum, Wearable World, and do on are all designed to teach you what you need to know to make your next round a success. Find one in the US and get going. Yes, it will cost you a little equity, but it may be worth it in networking and preparation for pitching the US VC market.
3. Pitch somewhere else. Why focus on the US? The VC market there is going to be bone dry in 2016. If you can secure money from anywhere (and you need it) I'd suggest you go and take it now. If you need to raise a round in Q2 2016, good luck to you, because you have a tough row to hoe.
4. PR. If you do an excellent job with PR--especially PR aimed at securing a new investor--you can make good headway in the US. But that will run you ~50k USD to raise 3+ MM USD if you're lucky. Performance can vary wildly.
5. Networking. Hit up the speaking and trade show circuit for your industry and shake enough hands, you'll eventually find a VC. But it's hard going and also super expensive if you're not a US company to travel that much to the US.
Hope one or more of these helped. Let me know if you have any follow up questions about, for example, pitching. Which is a whole 'nother ball game. 😊