Browser links take almost no space, so deleting them won't help. If you have any graphics intensive games, those are the biggest space hogs. Also, do you have any videos (movies, tv shows, podcasts) on your iPad? If so, delete those. Pictures, copy them off to a computer, and then you can delete them from your iPad.
with your iPad plugged into your computer in iTunes, look how much "Other" space is. if it has grown to larger than 3GB, you should think about resetting it to factory and manually reloading only what you need back onto it.
having an iPad 2 16GB, i knew how quickly i would run out of space, hence why i bit the bullet and paid the extra $100 for 32GB. do i cringe at paying $100 for $5 worth of extra memory - of course. am i glad every day that i did? of course