Help me to get out of BRONZE

Greetings summoners! Recently, i began to climb that ladder really fast when i picked up midlane {{champion:69}} and {{champion:99}}(I played adc for majority of the season) , got out of B3 to B2, then proceeded to climb even further up. After couple of good win streaks i managed to get to B1 with {{champion:145}}. Now im in B1 promos with 2 loses, my mmr is still pretty good at this point, but I think remaining promos will be hard. Give me your best advice on what should i do to win my promo series.
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