B the best you can B.
1. Focus on your surroundings. SBC is the King of the Portal, and in this game the universe follows suit, revolving around him. So watch him out of your peripheral while you watch the trajectory of his lost comrades.
B. Take the path of least resistance. Often it's better to stay in place while a single lock brushes against you. Sure, you'll take some damage, but it can be better than finding yourself in the middle of a group.
3. Don't B a square. Remember that you can move diagonally. Don't just press up, down, left and right. Try to get used to using diagonals regularly, it'll help.
4. Save your B's. Let your healing B's float around for a while. Rushing after them will be more of a hindrance than anything. Use them when healing from them will actually be effective based on your damage taken.
5. Weave in and out, and use the corners. Take advantage of openings in multiple trajectories. Also, if you pay attention to where the locks bounce, you might find that corners and walls are often safest.
Think that's all I got. Happy B day!