  We present strategies for determining electroweak penguins from experimental
data. Using the CKM-angle $\gamma$ as one of our central inputs and making some
reasonable approximations, we show that the $\bar b\to\bar s$ electroweak
penguin amplitude can be determined in a two-step procedure involving i)
BR$(B^+\to\pi^0K^+)$, BR$(B^-\to\pi^0K^-)$, BR$(B^+\to\pi^+K^0)$ and ii) either
BR$(B^0_d\to\pi^-K^+)$, BR$(\bar B^0_d\to\pi^+K^-)$ or $\acp(t)$ of the mode
$B_s\to K^+K^-$. The determination employing the $B\to\pi K$ transitions is not
affected by $SU(3)$-breaking effects. Relating the $\bar b\to\bar s$
electroweak penguin amplitude to the $\bar b\to\bar d$ case through $SU(3)$
symmetry arguments, we are in a position to estimate the electroweak penguin
uncertainty affecting the extraction of the CKM-angle $\alpha$ by using isospin
relations among $B\to\pi\pi$ decays. Our results allow in principle the
determination of CKM-phases in a variety of $B$-decays.
