Gear and brake cables

I'm having all sort of shifting problems and it's quite a while since my cables were changed (3.5k+ miles). I want to do it myself but I have absolutely no idea what I need to buy.
I have a Cube Agree GTC from 2012, any help would be appreciated.
I have a Cube Agree GTC from 2012, any help would be appreciated.
2012 Cube Agree GTC
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http://www.wiggle.co.uk/shimano-road-ge ... 5360446424
and this:-
http://www.wiggle.co.uk/shimano-road-an ... cable-set/
These sets will come with all the ferrules and terminals you need.
Plus a good quality set of cable cutters. Don't be tempted to scrimp on these as poor quality cutters will leave you with a shed load of problems from frayed inners and crushed/ deformed outers.
The Park Tools model seems to get good reviews:-
http://www.evanscycles.com/products/par ... rrency=GBP
Thankfully I already have that Park Tools cable cutter, needed it to crimp a cable end when I fitted new calipers without changing my cables.
Personally I have only rarely needed to use any adjustment on the front derailleur cable once it has been set up properly ( downtube barrel adjuster in this case). However it may be better to fit an adjuster on the front derailleur cable so that you have it as a fall back.