Use your Optical Zoom – most point and shoot digital cameras these days come with a zoom lens and all DSLRs are able to be fitted with one. Use them.
Use your Legs – most photographers have a built in zoom in the form of their legs. Don’t just rely upon your cameras zoom but actually position yourself effectively for close in shots.
Crop your Shots – the other option is to zoom in manually at home after you’ve taken your shots. This is a handy option to have but I personally prefer to use one of the first two options where I can because cropping shots later means if you want a large image that you’ll find that it becomes more pixelated. This is a good option if you’re just trimming shots but any major cropping will result in a loss of quality of your image.