I keep a log of how much I spend a year on train travel in a memo file on my phone. Need to get the calculator out later and see how much it is now, but probably getting to at least £250 now so far this year. Not a bad investment considering just how much I've travelled (around 1,900 miles for £250, if those figures are indeed correct, is not bad when you consider the large variety I've had too) but I see that figure increasing to more like £1,000 by the end of the year without any difficulty!
I'd keep more tickets, but I just can't be bothered. Some of them I use as bookmarks in my NREA at present, which at present are a single on line 401 Eindhoven to Eindhoven Airport, a West Yorkshire Day Rover and the return portion of a Hereford to Birmingham day return. I must admit though, I'd be curious to see how many WMDRs I've bought over the years, I think it was 3 of them last year and 2 of them already this year. With the other years too, I'd not be surprised if I'd done around 20 of them!
As for logging my journeys, I do this in multiple ways currently. These are normally typing them into a memo file on my phone as I go, then if it's a trip where I've got the time to do so I'll also save them in the RailMiles Offline app on my phone for uploading later, then they also go into the notebook for another backup, then since I got a laptop a while ago I also make a backup on there in a Word file and finally I write them all into my A4 book as well. Once the paper and laptop versions are done, I normally then bin the memo file on my phone, although sometimes I keep it for a while to enjoy the memories on my long commutes
Example of the electronic moves book is below:
455842, in 62750, Purley Oaks-East Croydon (0959,arr 1004)
319455+319424, in 62924, East Croydon-Elephant and Castle (via Tulse Hill (1003,2d,arr 1026)
51548+51547 Elephant and Castle-Oval (1037,arr 1041) (Northern)
51646+51545 Oval-Kennington (1044,arr 1045) (Northern)
51600+51601 Kennington-Tottenham Court Road (1046,arr 1055) (Northern)
92031+92038+92042+92075 Tottenham Court Road-Mile End (1058,arr 1112) (Central)
7073+7014 Mile End-Upton Park (1113,arr 1124) (District)
21389+21390 Upton Park-Barking (1127,arr 1134) (H+C)
357010, in 67760, Barking-Upminster (1134, arr 1141)
That's just a small number of the moves I made during Red Pen Fest, trust me when I say there were a lot more!
As for how it looks on RailMiles, this is my lot from 2014 not including Red Pen Fest's moves, as I've still got to process those yet. RailMiles is definitely worth the investment in my opinion:
http://techniquest.railmiles.org/