As an Architecture student, the best way to gain additional experience and stand a chance of getting noticed is by entering design competitions.
Competitions might be for real building designs or simply theoretical projects, and a lot of competitions are created with students in mind, meaning there's always something out there suitable for you to have a go at!
Some of the best places to find Architecture competitions are at the following websites:
Building Design is a renowned online magazine, covering all the latest major goings on in the built environment. Their competitions page lists various UK and international Architecture competitions, and is a great starting place if you're looking to create some high quality design entries.
Competitions.Org includes not only Architecture competitions, but landscape design and art competitions also. Whilst being based in the USA, the site gathers competitions from around the world, many of which are student-focused.
Death by Architecture offers a great choice of Architecture competitions to pick from, and allows you to filter results based on location, and whether they're aimed at students. A useful website.
Bustler lists hundreds of design competitions, both small and large, and covering a broad range of requirements.
The Architecture Room lists various worldwide competitions, including a lot of student competitions.