For smaller batches a colander would be just fine, but we've been soaking our tray's worth in custom-made colander-buckets placed in a solid bucket. Until they start to sprout we rinse them once a day to keep them moist. When they do sprout, pour them into a soil tray (I've also heard of people doing this special sprouting mats, as well--less mess?), and then just water them (rinse them) once a day until they're about 7 inches high.
