dput-ng ≥ 1.16 contains two usability changes which make uploading easier:

1. When no arguments are specified, dput-ng auto-selects the most recent .changes file (with confirmation).
2. Instead of erroring out when detecting an unsigned .changes file, debsign(1) is invoked to sign the .changes file before proceeding.

With these changes, after building a package, you just need to type dput (in the correct directory of course) to sign and upload it.