I take modafinil regularly (am on it right now) and believe me, the effect is extremely pronounced.
How have managed to avoid tolerance ?
I've avoided tolerance by not continuously taking it - if I'm no longer noticing the effects as much, I come off for a while until I really need it again. That seems to have stopped me from building up a lasting tolerance.
And another quick question what is ur schedule? What time do you take it?
I take it whenever I feel like I need a boost of concentration, it usually lasts about 6-8 hours so the latest I'll take it is 6pm if I want to sleep that night.