After not matching in Phase I, you get to do Phase II (which I enjoyed because of the shortened timeline and the "surprise" to find certain sites available). Last year, applicants submitted TONS of applications in Phase II and flooded the market but I think it was a significant improvement over the clearinghouse, based on what I've heard about that system. If you still don't match, you get on the Post-Match Vacancy Service email list and/or check the match site for new positions or updates. There were maybe one or two dozen vacancies available, including a couple APA accredited ones, this year.
An APPIC member internship may be a pretty safe choice depending on what you want to do. If you want to work in a VA, APPIC member sites aren't an option. But if you want to get licensed in most states and not work in a VA (ever) and you are prepared to carefully document your internship experiences, you should be okay. That's assuming that your grad program allows you to complete a non-APA accredited internship, which many programs don't permit. You should also check the licensing laws in the state(s) where you want to eventually practice. They're pretty specific about requirements.
I personally would not take a non-APA, non-APPIC member internship because there is no oversight by APPIC or the APA and you could be signing up for a year (or more) of harassment and exploitation. If it didn't work out, you would have little recourse. I would take an APPIC member internship if my program allowed it because APPIC membership indicates that there's consistency and certain standards in the internship program. If these aren't lived up to and it's a negative experience, you can (after going through appropriate channels at the internship) alert APPIC to the problem. This means the site has a similar investment in making the internship work out. But that's just me.
I didn't match last year and I've had to put my life on hold (e.g., I will not start a family for at least another year, won't have a sustainable paying job for another 2 years) and explain to people that I'm still in school, technically, even if it doesn't look like that. If I don't match again, I will leave grad school and pursue other goals. It's sad but after I saw the average debt for Psy.D. students upon applying for internship ($120,000
) and the median salary for psychologists (<$70,000), I realized that being a psychologist is not as important to me as my other life goals right now. I could not have imagined saying that 2 years ago but I guess stuff happens.
On a positive note, more than 3 of every 4 applicants match, so everyone has a pretty good chance.