I'd say look at the teacher's students. Do you want to be like them? If you see a good and harmonious sangha, and if they're practicing well and are good people with good hearts, then you have a cause for trust.
Tenzin PalmoEvery country that meets Buddhism molds it into their own indigenous religion, as America will. A very clear example of this is Japan, which threw out almost all the dharma, and just kept that essence, which spoke to them.
Tenzin PalmoLook at your own potential. Don't overestimate your capabilities and push too hard, or underestimate them and use that as an excuse to be lazy.
Tenzin Palmo