For some reason, I get hung up about using the brakes on this bike I'm borrowing. If I want to stop, but don't have to, I can stop nicely (not textbook-perfect, but good enough) using them. It's when I have to stop to avoid something that the trouble starts. For some reason, I revert to using my feet to stop. Now, I know that the brakes are more effective (as bad as they are) and that on the road bike, I won't be able to do that. I nearly ran into the curb in the parking lot today because of this braking issue, which could have had rather nasty results.

Does anyone have any suggestions to help me get over this and start using the brakes when I need to?

(I feel like such a pest...)
Thanks in advance!