I am in sales too... This is ow my system works...
Current Sales Projects are in the project lists. Everything else go to my tickler file.
If I have a potential sale for a prospect/custumer and I want to contact him in 2 months I just drop the name of the company in the Tickler file.
I use an index card for each opportunity, so it is easy for my to activate or deactivate (to the tickler file) opportunities and sales...
I do not put them in someday maybe, becasue usually I can define the date I need to get back and work in the issue, so it is better for me the tickler file, than see something everyweek that I am not going to act in the next 3 months...
My 2 cents...