I might not get any PhD offers this year. I would like to apply again , what can I do to maximize chances I am a mathematics undergraduate. I would like to get into a top 10 PhD school and might not do so this year. I would like to apply again and want to do what whatever is necessary to maximize my chances. 

I have always heard that a masters in math is terminal and it might be too late to apply for one this year anyway(please correct me if I am wrong here).

What are my options?

Edit: I am currently in India, finishing my bachelors from one of the top schools here. I applied to places like UCB, Columbia, Chicago, Michigan-Ann Arbour and Wisconsin - in the area of algebraic number theory. I now realize that it was a little out of reach as of right now. 

I have slightly low grades overall and good but not great math GPA(8.5 and 9.3/10 - 10/10 in graduate courses) and Subject scores(88%). I also do not really have research but from what I understand, undergraduate research is rare.
You've got a couple of options


See what happens with the current applications.  You may be surprised.
Try to get a job as a researcher at your current university.  If a prof. has worked with you and can vouch for you this will be much easier.
Have really awesome GRE or equivalent scores.
Cast a wider net.   Searching "top 10" on this site gets you 200 results!  You may want to apply to schools outside of the top 10 in your field as this seems to be the cut-off most well-qualified applicants use.