How can I re-enable managed mode after monitor mode??

[London]

So of course I use airmon-ng to enter monitor mode. I kill the processes that might interrupt (the ALFA works much better without them).
I get a handshake. Then I cannot figure out how to start using ethernet or either of the wireless cards again.
I have tried: ifconfig wlan0 up, iwconfig wlan0 mode managed, and a few other similar simple commands.

Could someone please tell me how to access the internet again after using monitor mode and killing those processes?

[rastamouse]

It should be as simple as killing the monitor interface with

airmon-ng stop mon0

and re-starting the services you killed such as DHCP

dhclient wlan0

[mmusket33]

Try

ifconfig wlan0 down
iwconfig wlan0 mode managed
ifconfig wlan0 up

alternatively

ifconfig wlan0 down
iwconfig wlan0 mode monitor
ifconfig wlan0 up