[oleh]

Do not tilt the antenna though. Maximum emission of an dipole is perpendicular to its axis.

[jacquesm]

On occasion, going against the grain (in case of interference from another transmitter) can help if you can polarize the signal somehow.

https://en.wikipedia.org/wiki/Dipole_antenna

Of course you'd have to do the same thing at the receiver.

[walshemj]

you can for point to point use multiple ap with anteneas using differently polarised antenas - to increase the bandwidth

[flattone]

That seems intuitive and useful.