Easy to do if you're primarily paying for your own flights. have built up a decent bank of miles, and rather like the fleixbility that full redemptions offer. I had a very low TP total about three months into my membership year, now fortunately at a comfortable 460 just six months into it.
Just book some MFUs instead, preferably when the class you're upgrading from has a sale on. Can be tricky to find a sale fare that coincides with redemption availability, I know, but work at it. Both WTP to CW and CW to F are good value uses of miles and earn plenty of TPs.