Rattie's right.
You'll want to check your gutters for proper drainage.
You'll also need to check your land, make sure that the lay of the land is not funneling more water than it should towards your house. Alot of times you need a few hours on a bobcat building berms or moving hills this way or that.
Make sure there are no bushes growing too close to the house. Most people think that planting bushes next toa house will help with water in a basement. the thinking is that the root system will drink up the water. Not true, what the root system does is grows down along the basement wall creating channels for the water to run and pool in.
The best way to go about doing what your doing if the above steps have not resolved your issue is to dig out around your basement and put in a water barrier and theres this corrigated panelling stuff that takes what ever water makes to the wall and shoots it out in the yard kinda like your leach lines on a septic tank.
Then, after all that drylock your interior walls, if there is still moisture coming through.
a sump pump (inside the house) is really a last resort. Thats kinda like saying youve given up on preventing water entry and have resorted to water management. But, if your gonna do it... build a good quality french drain, dig a sump hole for the french drain to channel into and the drop in a pump and run the water outside of the house....preferably on the down hill side so it doesnt run right back in. Your still allowing that water to flow past your walls and foundation, which is not great for it, erosion and all.
Ive seen people dig trenches and channels in front of a house or under a porch and put a sump in there to pump water out before it makes tothe house. My boss has one on the backside of his house, at the bottom of a hill where the water drains to his basement door. Just gotta remember to keep it cleaned out so it doesnt clog and overflow.
