window of opportunity opens for a while. u miss it u may hv to wait a long while or it may not come again!

seize it and make the best of it

The marketplace openings that exist because other retailers have not yet capitalized on them.

www.prenhall.com/rm_student/html/glossary/o_gloss.html

Things that exist in an organisation’s external environment and often take the form of new markets or new chances for a firm to sell its products and services.

wps.pearsoned.co.uk/wps/media/objects/1513/1550326/glossary/glossary.html

Check out the google site below for even more information on opportunities.