1) Color -choose a color and patterned paper relevant to your topic, or better style to enhance your content ideas– make a scrapbook page that is color blue for baby boy, oranges/yellows/reds for holiday in fall.
Warning – too many colors and different combinations of patterned papers can be overpowering.
Stick to a few colors, simple patterned paper and stay with that theme to get a uniformed look.
You may be thinking that you want an eclectic look rather than uniformed. This may work for certain topics but can look very messy very quickly.
It can be hard to really make something stand out if there's a lot going on. If you have an abundance of photos, keepsakes, and memories that do not go with the colors and pattern you have chosen you can do one of two things:
A) include inside an envelop stuck to the page
B) choose a different theme and color for each page. More your photos to the page that has matching colors.
2) Background – find a background that compliments the content not swamps it.
It also helps to have a plain background if you have a lot to fit on the page. Use topical backgrounds.
For example for a university memories scrap book you might use your old essays printed on colored paper with a pale colored font.
3) Presentation style/format– this will depend on the way it's to be presented – in a book, poster or card etc.
Consider your topic and choose a presentation style that enhances it.
For example, if it's a holiday you want to scrapbook, a great way of presenting it is to make the cover a passport cover each page could have a traditional passport page as background or suitcase with luggage tags attached.
4) Text and how it's presented – you may want to frame this, use your own handwriting or stencils.