I used to have the same problem until I found my fave mascara is Hypnose Waterproof by Lancome, it makes my eyelashe look pretty full, and trust me this stuff works, I work in a pizza place which means i have to stay all f%^^# day next to the hot oven and i swear my mascara won't run ever!! and i work double shifts.. and it looks like i just put some, it costs $22 which I think is worthy, and i would recommend some "strong " make up remover, since it's waterproof.. for this i use MAC gently off eye and lip make-up remover , this makes it easy to take off.
I hope that helps.