The first thing to check is the wheel alignment if the tyres are wearing unevenly. You can do a basic setting for camber (ie. approx 0 degrees) by using a spirit level. The way to do this is as follow :-
Jack the car up
Remove one wheel
Place the spirit level on the front panel
Lower the jack until the spirit level is level
Place the spirit level on the brake disc
Adjust the disc/strut with the 2 suspension bolts or the balljoint bolts on the wishbone
Do this until the spirit level is level
Tighten bolts
Repeat for other wheel
Hope that helps
