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The NBA draft is a huge opportunity for franchises to improve their roster without giving anything up.

Lottery teams are looking for All-Stars and cornerstones that can change the direction of the organization and whom they can bank on for years to come. Those picking later in the first round are just hoping to add depth or fill holes with players who can contribute on rookie contracts.

And every year, we see general managers make mistakes by focusing on positions, worrying too much about specific needs or simply misevaluating.

These are the mistakes each franchise needs to avoid on June 21.