For what it is worth--I have the same exact problem. I have found that using a heavier razor makes it a bit easier. When I used a smaller, lighter razor I had trouble balancing the fact that you cant put too much pressure on your skin, but you still need a firm stroke. I guess the heavier razor allows me to control the pressure I use against the skin more, allowing me to get a firm pass across my face while wihtout ripping my skin off (which, believe me, I have done).
When I posted a similar question, the advice that was given to me--which turned out to be really good advice--was that it just takes practice.