From memory, a full list of journeys taken along with the means by which I travelled; for completion sake I include a few coach journeys too:
2014
Travel throughout
Berlin (variety of bus, tram, S-Bahn, U-Bahn and RE/RB services covered by the Berlin WelcomeCard)
Berlin - Magdeburg (return journey on a regional service using the Schone-Wochenende Ticket)
Berlin - Leipzig (return journey on an ICE train, ticket purchased some days in advance using a ticket machine in Berlin)
2015
Travel throughout
Munich (variety of public transport using day tickets where required)
Munich - Stuttgart(return journey on an ICE train, ticket purchased in advance before departure from the UK using the English-speaking helpline for Deutsche Bahn)
Munich - Innsbruck (return journey on an EC train, ticket purchased in advance before departure from the UK using the English-speaking helpline for Deutsche Bahn)
Munich - Augsburg (return journey on an regional service, Bayern-Ticket)
Munich - Nuremburg (return journey on an regional service, Bayern-Ticket)
2016
Travel throughout
Hamburg (variety of public transport using day tickets where required)
Hamburg - Timmendorfer Strand (return journey on a regional service, Schleswig-Holstein-Tarif ticket)
Hamburg - Bremerhaven (return journey on a regional service, Niedersachsentarif ticket)
Hamburg - Walsrode (return journey on a regional service, Niedersachsentarif ticket)
Hamburg - Walsrode (return journey on a regional service, Niedersachsentarif ticket)
Hamburg - Hannover (return journey on an ICE train, ticket purchased in advance before departure from the UK using the English-speaking helpline for Deutsche Bahn)
2017
Travel throughout
Prague (variety of public transport using day tickets where required)
Prague - Plzen (return journey on a České dráhy service)
Prague - Plzen (return journey on a České dráhy service)
Prague - Jihlava (return journey on a StudentAgency coach booked from the ticket office at Praha hl.n some days prior)
Prague - Chomutov (return journey on a StudentAgency coach booked from the ticket office at Praha hl.n some days prior)
2018
Schiphol Airport - Amsterdam (single journey using a NS Intercity service, ticket purchased at airport)
Amsterdam - Duisburg (return journey on an ICE train, ticket purchased in advance before departure from the UK using the English-speaking helpline for Deutsche Bahn)
Duisburg - Krefeld (travel between these two cities and within each city on trams and RE/RB trains, using a VRS-fare ticket)
Amsterdam - Arnhem (return journey using a NS Intercity service)
Amsterdam - Rotterdam (return journey using a NS Intercity service)
Amsterdam - Amersfoort (return journey using a NS Sprinter service)
Amsterdam - Best (return journey using NS Sprinter and NS Intercity services)
Amsterdam - Antwerp (return journey using a NS International Intercity service, ticket purchased in advance from the NS International website)
Amsterdam - Schiphol Airport (single journey using a NS Intercity service, ticket purchased at Amsterdam Centraal)
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Flughafen Dusseldorf - Cologne (single journey on a regional service using a SchönerTagTicket NRW
Cologne - Dortmund (return journey on a regional service using a NRW tariff ticket)
Cologne - Wuppertal (return journey on a regional service using a VRS-fare ticket)
Cologne - Aachen (return journey on a regional service using a VRS-fare ticket)
Cologne - Frankfurt (return journey on an ICE train, ticket purchased in advance before departure from the UK using the English-speaking helpline for Deutsche Bahn)
Cologne - Dusseldorf (single journey on a regional service using a SchönerTagTicket NRW)
Dusseldorf - Rheinburg (single journey on a regional service using a SchönerTagTicket NRW)
Rheinburg - Cologne (single journey on a regional service using a SchönerTagTicket NRW)
Cologne - Flughafen Dusseldorf (single journey on a regional service using a NRW tariff ticket)
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Travel throughout
Berlin (variety of bus, tram, S-Bahn, U-Bahn and RE/RB services covered by the Berlin WelcomeCard)
Berlin - Potsdam (return journey using regional services covered by the Berlin WelcomeCard)
Berlin - Magdeburg (return journey on a regional service using the Schone-Wochenende Ticket)
Magdeburg - Schonebeck (return journey on a regional service using the Schone-Wochenende Ticket)
Berlin - Halle (single journey on an ICE train, ticket purchased in advance before departure from the UK using the English-speaking helpline for Deutsche Bahn)
Halle - Leipzig (travel between these two cities and within each city on S-Bahn, trams and RE/RB trains, using a MDV day ticket)
Leipzig - Berlin (single journey on an ICE train, ticket purchased in advance before departure from the UK using the English-speaking helpline for Deutsche Bahn)
Berlin - Dresden (single journey on an EC train, ticket purchased in advance before departure from the UK using the English-speaking helpline for Deutsche Bahn)
Dresden - Chemnitz (travel between these two cities and within each city on S-Bahn, trams and RE/RB trains, using a Sachsen-Ticket)
Chemnitz - Berlin (single journey on an ICE train and regional connections, ticket purchased in advance before departure from the UK using the English-speaking helpline for Deutsche Bahn)
Think that's the lot!
As one might have guessed, this year I have been trying to make the most of having freedom of travel within the EU whilst I still have it!