I'm somewhat obsessed with the cute little cat-foot look! I think it is adorable, and it is so easy to maintain.
I use a battery operated women's personal razor ($20 at any drug store!) for the hair on the bottom of the feet. They are nice because they don't get hot and are designed for female personal areas so are quite gentle. Usually quite small and maneuverable, too.
As for trimming the hair on the top and sides of the paws, you just need a small pair of blunt nosed scissors, a pair of thinning shears, and a small slicker brush.
With the slicker brush, brush the hair on the top of the paw backwards so it is standing up. With the thinning shears, trim the long hair as short as you would like. Then with the small blunt nosed scissors, trim the hair around the nails even and round.
TA-DA! Cute cat-feet!
I do one big grooming session each week, including stripping, brushing, feet and ears. This week I will try to remember to take pictures as I do the feet so that it will show the steps a bit better. Once you get the hang of it, it only takes a couple of minutes to do. And no rogue toe hair (a personal pet peeve

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