The good thing about conventional wisdom is that it is generally wrong. Nonetheless, it appears that a fairly significant number of Continuing Anglicans believe it anyway, and some try to prove it. Those who do make life easy for themselves, willing to pay the price of occasional depression, and pretending that their lethargy is humility. Their version of humility, which is defined as accepting the inevitable and never asserting that we have a better way, provides an excuse for this laziness. "Our numbers must always be small, and that's just the way it is." If you believe that, it will happen to you according to your faith. But, allow me to part company with you, at least far enough away to be at a safe distance if the earth opens under your tents.
I have seen growth at St. Benedict's since arriving here, the count of new members since arriving fourteen months ago standing at twenty-seven, bringing the parish membership up close to one hundred. That is small compared to other parishes I have seen. I am not the number one expert on church growth, and I don't pretend to be; but I have tried and proved a few ideas that I want to float out there.
1. Assume you can grow. This is a matter of faith, if you put your trust in God, that He will do the work if you want Him to.
2. Make room. If you have only the highest of services then consider adding something a little lower in addition, such as a straight Prayer Book Holy Communion and Morning Prayer. The low church people looking for a home should not be left out in the cold.
3. Use the pulpit to preach the Gospel. This is the most important advice of all for readers who are among the clergy. Do not give some mild presentation designed to go largely unnoticed. Prayer for the fire of the Holy Spirit, and go at it simply, directly and powerfully (see this and this).
4. Demonstrate due diligence. Continuing churches need to keep proper records to ensure that people have the basic sacraments of baptism and confirmation.
5. Do not be an underwriter or gatekeeper. Point 3 above should never come across as unwelcoming or restrictive conditions for membership, but as evidence that the priest is diligent in his pastoral duties for the good of each person.
6. Have user friendly bulletins, inasmuch as people who are not accustomed to liturgy do not need to feel stupid.
7. Seek the lost, not only by trying to have evangelism programs, but also looking for those who have wandered off or drifted away.
Damn the conventional "wisdom," and full speed ahead.
The floor is open in comments for additional thoughts.