fill my passport before it expires

Thanks in part to my multiple-entry Indian visa and my GB work visa, each of which take up one page, i’m now at 10 pages full; my passport expires in April of 2010. 6 years ago

For reference, US passports are valid for 10 years and have 15 pages for visas, entry stamps, &c. I believe more can be added in later, but this goal is for the base 15. Each page has 4 squares for the standard stamps, although many visas take up more than one square. 6 years ago