The short answer would be to target as many keywords as you can. Just do your research to find all keywords related to your niche that have an acceptable level of traffic and low competition. If you can only find 10-15 then only target those. If you find 100 then target them all. You want to get as much traffic as possible as long as it's relevant to your market so go after everything. Just watch for competition so you don't waste time on words you will never rank for.
sounds good... i guese i'll finish te keyword research today . might ake a few hours but i would reallwant it dodne today.. ye ye
Yeah good keyword research takes time but its one of the most important things you can do. Keywords are after all where most of your traffic comes from if you're doing SEO. Don't short yourself on this process or you could be leaving a lot of money on the table.