The sinus massage I had several years ago, was performed by a naturopath, in association with acupuncture. From memory, the massage started at the forehead, down the sides of the face, and under the eyes and cheeks, and behind the jaw to the neck, following the sinuses. He explained that the idea was to stimulate the sinus passages, and to try to get any accumulated "gunk" moving.
You are probably better off having a professional do it, imo.
A steam inhalation, or a hot bath/shower will help to loosen up any congestion allowing you to expel it via your throat.
If it's warm weather, and you're at the seaside, you can try flushing the nasal passages by immersing your head and inhaling the salt water through your nose - it takes a bit of getting used to, but the results are worth it.
Have you tried to work out what is CAUSING the problem?
Usual suspects are dairy products.
Give the Sudafed a wide swerve - it's verboten in most airwork ops, as it causes drowsiness. I also believe that a lot of the anti-sinus prescriptions dry the mucous up, but don't help to clear it out of your system.
In a nutshell, go and see a good naturopath, you will probably be amazed at the results in a very short time, without resorting to prescription drugs.