I would love ideas to effectively test out my product ideas without investing too much time or funds into creating a product no one seems to want or need.
Great question, many entrepreneurs are stuck before launch because of this hurdle. I have helped many individuals turn full time entrepreneurs through succinct consecutive coaching in various industries. Here are my suggestions, but keep in mind they are generic because you didn't provide any details.
1. If you have a prototype or design, re-design it with the intentional focus of removing certain features. Making trade offs are critical and simplify your introduction, pitch, and value proposition as well increase the chances of people being 100% impressed with the limited featured offering rather than semi impressed and focus on what is done wrong.
2. aim for simplicity in your pitch, avoid jargon and create a simple story on how to present the problem solution your 1 or 2 features is offering. - go to older family members for this, not friends or coworkers.
3. go to Fiverr.com and maybe if needed look there for a cheap and quick prototype mockup.
4. create simple landing page to present as if you are a fully working startup. go to www.instapage.com for quick landing pages and if you want a domain go to www.unthinkhosting.com for cheap domains - use code unthink for discount, it should give you some savings there.
5. go to startup weekend events instead of all 3/4 above and just create a simple pitch (under 1 minute) to present your problem and solution idea. if selected you get a team for a full weekend to validate something together.
6. Or create a facebook product page, upload some images (not sales pitches) of problems w/ problem story descriptions... post a lot of those... randomly posting images of your product (already simplified in features) and launch a small budget campaign, say $15.00 for paid advertising featuring your simplified product image, little or not text in the image but with a very short story and solution as header.
trust me, is critical that you remove features. If you are not willing to make trade offs, from my experience you are not ready to try entrepreneurship at all.
I hope this helps and look forward to seeing you succeed!