There is no options to upgrade your laptop to be game-able on new games. Even gaming laptop is very limited to upgrade options. If laptop gets slow, give it to a relative or the charity and get a new one. Hence, gaming on laptop exclusively is not a good way to go. That said, if you still want to get better performance, we are here to help. But really I don't think I cannot see how to make your laptop game-able on new games.
Sorry, but you are gonna have to buy a new laptop if you want to play more current games. If you don't have the cash, then you'll simply have to play slightly older games that are not as demanding as more recent games.
Don't feel too bad though. I have and still use an old IBM ThinkPad T40 from 2003 which as a Pentium M 1.5GHz CPU and a Mobility Radeon 7500 card. Just for nostalgia, I installed Halo and Star Wars: KOTOR II on it for some "low performance" fun.