Tunes - Tuneflow

Most people will tell you that day trading is a money risk that's not really worth the effort. If it's a risk you're considering, take a look at TradingSim first, a flash-based site that simulates day trading without the money risk.

If you like to write but lack confidence in your skills, Paper Rater is a a free, web-based service that analyzes your writing and offers feedback on your grammar, spelling, and more.

If you've ever had a friend send you a link that you just weren't sure about, webapp Variably Safe For Work (semi-)safely previews the page before you actually visit it.

If you've got a yen for online journaling but aren't ready to expose your innermost thoughts to the world, Penzu is worth a look. It combines a slick blogging platform with solid privacy features, offering fine-grained control over who sees your writing.

In his web-site-turned-book Things I Have Learned in My Life So Far, Stefan Sagmeister says keeping a diary supports personal development. I couldn't agree more. Writing's a form of thinking, and journaling is a great way to think through personal issues.

When you're trying to set up a meeting with someone who's as busy as you, it's tempting to just flop open your datebook and say "pick a time when I'm free." MeetWith.Me lets you do that while keeping your appointment details private.

It can be awkward asking for honest feedback from the people around you, but knowing how others perceive us is important to self improvement. New service BetterMe helps you solicit advice from others without putting them on the spot.

It's not in every account, but "Server Clipboard" is an intriguing addition to Google Docs. It bypasses browser problems with copying and pasting, and lets you copy multiple items and paste them—in Docs, for now, and probably Gmail soon.

For simple, on-the-fly kitchen conversions, type something like "4 tablespoons into ounces" into Google, Bing, or most any search engine. For weird units and precise measures, consider ConvertCenter, a dedicated webapp with a fairly easy URL to remember.