What are the best tips for circuit practice with strong crosswind? I am a student pilot with around 30 hours of flying right now. I am yet to solo and I am currently in the final stages of closed circuit practice.

Overall, my pattern work is good. However, maintaining the perfect "rectangular" circuit gets tricky for me when facing strong quarterly crosswinds (10 knots gusting 16).

I guess its the visualizing the wind that really gets me confused. I set the heading bug to sort reference where the wind is coming from which helps a lot.

But just wondering if I could get more tips on this. Anyone else had the same issue during their student days?

I fly a Cessna 172S.
Try visualizing the pattern.  

In your mind's eye, overlay the airspace around the airport with the track that you want your flight to take, visualizing all sections of the traffic pattern from your point of view as you fly.  Now check to see if there are visual references on the ground eg buildings, roads, parks, golf courses, etc. which align with this pattern you are visualizing and use them as additional aid for pattern legs and turn points.  If the airplane drifts off this track, adjust your crab angle and/or your rate of turn in order to track correctly.  

As mentioned above, ground reference maneuvers such as rectangular patterns, turns about a point, S-turns etc are very useful and may be good basic practice for training yourself to visualize the pattern in space.