The first thing that you will need to do is to check the drawer carefully. Examine if the bureau is off centre or twisted. In such case, you can just reposition the bureau and your problem is solved.
You can also exchange the problematic drawer with the other drawer in the bureau. Most of the times, it will solve your problem. If it does not, examine the area where the drawer slides in. If you find any nail popping out, just hammer it and the obstruction will be gone. In some cases, clothes or any similar thing can also cause obstruction in the way of the drawer. If that happens, remove the piece that is causing barrier.
If you do not find any obstruction, you can sand the drawer runners, before applying a lubricating agent on it. You can use paraffin, beeswax or bar soap for that purpose. In case of metallic runners, you can use lubricating oil after cleaning the runners with a dry rag.
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If any corner of side is loose, you can fix it by using wood glue. Make sure you reinforce the joint by using a corner clamp. Do not remove the clamp until the glue gets dry.
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You can also sand the side of the drawer to make it move freely on the runner. However, use this method as the last resort, as it will alter the side of the drawer on permanent basis.
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